2691049955364 has 81 divisors (see below), whose sum is σ = 6872932318161. Its totient is φ = 887807210400.

The previous prime is 2691049955359. The next prime is 2691049955371. The reversal of 2691049955364 is 4635599401962.

The square root of 2691049955364 is 1640442.

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

2691049955364 is a `hidden beast` number, since 2 + 6 + 9 + 1 + 0 + 4 + 9 + 95 + 536 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2585528929764 + 105521025600 = 1607958^2 + 324840^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 994106499 + ... + 994109205.

Almost surely, 2^{2691049955364} is an apocalyptic number.

2691049955364 is the 1640442-nd square number.

It is an amenable number.

2691049955364 is an abundant number, since it is smaller than the sum of its proper divisors (4181882362797).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2691049955364 is an equidigital number, since it uses as much as digits as its factorization.

2691049955364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5626 (or 2813 counting only the distinct ones).

The product of its (nonzero) digits is 62985600, while the sum is 63.

The spelling of 2691049955364 in words is "two trillion, six hundred ninety-one billion, forty-nine million, nine hundred fifty-five thousand, three hundred sixty-four".