25072978051 has 32 divisors (see below), whose sum is σ = 28200960000. Its totient is φ = 22099128480.

The previous prime is 25072978039. The next prime is 25072978067. The reversal of 25072978051 is 15087927052.

It is a happy number.

It is not a de Polignac number, because 25072978051 - 2⁵ = 25072978019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25072977992 and 25072978010.

It is not an unprimeable number, because it can be changed into a prime (25072978001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29052846 + ... + 29053708.

It is an arithmetic number, because the mean of its divisors is an integer number (881280000).

Almost surely, 2^25072978051 is an apocalyptic number.

25072978051 is a deficient number, since it is larger than the sum of its proper divisors (3127981949).

25072978051 is a wasteful number, since it uses less digits than its factorization.

25072978051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519.

The product of its (nonzero) digits is 352800, while the sum is 46.

The spelling of 25072978051 in words is "twenty-five billion, seventy-two million, nine hundred seventy-eight thousand, fifty-one".