251428470995 has 32 divisors (see below), whose sum is σ = 331558920000. Its totient is φ = 181888971264.

The previous prime is 251428470983. The next prime is 251428471097. The reversal of 251428470995 is 599074824152.

It is not a de Polignac number, because 251428470995 - 2⁸ = 251428470739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251428470995.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2214881 + ... + 2325629.

It is an arithmetic number, because the mean of its divisors is an integer number (10361216250).

Almost surely, 2^251428470995 is an apocalyptic number.

251428470995 is a deficient number, since it is larger than the sum of its proper divisors (80130449005).

251428470995 is a wasteful number, since it uses less digits than its factorization.

251428470995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111479.

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 251428470995 in words is "two hundred fifty-one billion, four hundred twenty-eight million, four hundred seventy thousand, nine hundred ninety-five".