2489764961 has 4 divisors (see below), whose sum is σ = 2489942292. Its totient is φ = 2489587632.

The previous prime is 2489764931. The next prime is 2489764967. The reversal of 2489764961 is 1694679842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1694679842 = 2 ⋅847339921.

It can be written as a sum of positive squares in 2 ways, for example, as 1190595025 + 1299169936 = 34505^2 + 36044^2 .

It is a cyclic number.

It is not a de Polignac number, because 2489764961 - 2¹⁰ = 2489763937 is a prime.

It is a super-2 number, since 2×2489764961² = 12397859122046663042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2489764897 and 2489764906.

It is not an unprimeable number, because it can be changed into a prime (2489764967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65606 + ... + 96351.

It is an arithmetic number, because the mean of its divisors is an integer number (622485573).

Almost surely, 2^2489764961 is an apocalyptic number.

It is an amenable number.

2489764961 is a deficient number, since it is larger than the sum of its proper divisors (177331).

2489764961 is a wasteful number, since it uses less digits than its factorization.

2489764961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177330.

The product of its digits is 5225472, while the sum is 56.

The square root of 2489764961 is about 49897.5446389900. The cubic root of 2489764961 is about 1355.3541302853.

The spelling of 2489764961 in words is "two billion, four hundred eighty-nine million, seven hundred sixty-four thousand, nine hundred sixty-one".