2149603791956 has 12 divisors (see below), whose sum is σ = 3763571928480. Its totient is φ = 1074297526680.

The previous prime is 2149603791947. The next prime is 2149603792003. The reversal of 2149603791956 is 6591973069412.

It is a super-2 number, since 2×2149603791956² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 126082736 + ... + 126099783.

It is an arithmetic number, because the mean of its divisors is an integer number (313630994040).

Almost surely, 2^{2149603791956} is an apocalyptic number.

It is an amenable number.

2149603791956 is a deficient number, since it is larger than the sum of its proper divisors (1613968136524).

2149603791956 is a wasteful number, since it uses less digits than its factorization.

2149603791956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252184654 (or 252184652 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 62.

The spelling of 2149603791956 in words is "two trillion, one hundred forty-nine billion, six hundred three million, seven hundred ninety-one thousand, nine hundred fifty-six".