2991307755564 has 24 divisors (see below), whose sum is σ = 7755242329520. Its totient is φ = 997102585152.

The previous prime is 2991307755521. The next prime is 2991307755587. The reversal of 2991307755564 is 4655577031992.

2991307755564 is a `hidden beast` number, since 2 + 9 + 9 + 1 + 3 + 0 + 7 + 75 + 556 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13848646909 + ... + 13848647124.

Almost surely, 2^{2991307755564} is an apocalyptic number.

It is an amenable number.

2991307755564 is an abundant number, since it is smaller than the sum of its proper divisors (4763934573956).

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

2991307755564 is a wasteful number, since it uses less digits than its factorization.

2991307755564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27697294046 (or 27697294038 counting only the distinct ones).

The product of its (nonzero) digits is 71442000, while the sum is 63.

The spelling of 2991307755564 in words is "two trillion, nine hundred ninety-one billion, three hundred seven million, seven hundred fifty-five thousand, five hundred sixty-four".