2780492885361 has 9 divisors (see below), whose sum is σ = 4016274726841. Its totient is φ = 1853658588612.

The previous prime is 2780492885327. The next prime is 2780492885381. The reversal of 2780492885361 is 1635882940872.

The square root of 2780492885361 is 1667481.

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

2780492885361 is a `hidden beast` number, since 2 + 7 + 8 + 0 + 4 + 92 + 8 + 8 + 536 + 1 = 666.

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

It is not a de Polignac number, because 2780492885361 - 2⁹ = 2780492884849 is a prime.

It is a super-2 number, since 2×2780492885361² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2780492885381) 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, 4724530 + ... + 5280356.

It is a 1-persistent number, because it is pandigital, but 2⋅2780492885361 = 5560985770722 is not.

Almost surely, 2^{2780492885361} is an apocalyptic number.

2780492885361 is the 1667481-st square number.

2780492885361 is the 833741-st centered octagonal number.

It is an amenable number.

2780492885361 is a deficient number, since it is larger than the sum of its proper divisors (1235781841480).

2780492885361 is an frugal number, since it uses more digits than its factorization.

2780492885361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111660 (or 555830 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 63.

The spelling of 2780492885361 in words is "two trillion, seven hundred eighty billion, four hundred ninety-two million, eight hundred eighty-five thousand, three hundred sixty-one".