2991810156 has 12 divisors (see below), whose sum is σ = 6980890392. Its totient is φ = 997270048.

The previous prime is 2991810109. The next prime is 2991810163. The reversal of 2991810156 is 6510181992.

2991810156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124658745 + ... + 124658768.

It is an arithmetic number, because the mean of its divisors is an integer number (581740866).

Almost surely, 2^2991810156 is an apocalyptic number.

It is an amenable number.

2991810156 is an abundant number, since it is smaller than the sum of its proper divisors (3989080236).

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

2991810156 is a wasteful number, since it uses less digits than its factorization.

2991810156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249317520 (or 249317518 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 42.

The square root of 2991810156 is about 54697.4419511553. The cubic root of 2991810156 is about 1440.9359521015.

The spelling of 2991810156 in words is "two billion, nine hundred ninety-one million, eight hundred ten thousand, one hundred fifty-six".