2490775211961 has 9 divisors (see below), whose sum is σ = 3597793256239. Its totient is φ = 1660513651536.

The previous prime is 2490775211941. The next prime is 2490775211983. The reversal of 2490775211961 is 1691125770942.

The square root of 2490775211961 is 1578219.

It is a perfect power (a square), and thus also a powerful number.

2490775211961 is a `hidden beast` number, since 2 + 49 + 0 + 7 + 7 + 521 + 19 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14382005625 + 2476393206336 = 119925^2 + 1573656^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2490775211961 - 2⁷ = 2490775211833 is a prime.

It is a super-2 number, since 2×2490775211961² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2490775211898 and 2490775211907.

It is not an unprimeable number, because it can be changed into a prime (2490775211941) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4471621 + ... + 4997693.

Almost surely, 2^{2490775211961} is an apocalyptic number.

2490775211961 is the 1578219-th square number.

2490775211961 is the 789110-th centered octagonal number.

It is an amenable number.

2490775211961 is a deficient number, since it is larger than the sum of its proper divisors (1107018044278).

2490775211961 is an frugal number, since it uses more digits than its factorization.

2490775211961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052152 (or 526076 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

It can be divided in two parts, 2490775 and 211961, that added together give a square (2702736 = 1644²).

The spelling of 2490775211961 in words is "two trillion, four hundred ninety billion, seven hundred seventy-five million, two hundred eleven thousand, nine hundred sixty-one".