25391516415015 has 32 divisors (see below), whose sum is σ = 41622558264000. Its totient is φ = 13210181319680.

The previous prime is 25391516414947. The next prime is 25391516415017. The reversal of 25391516415015 is 51051461519352.

It is not a de Polignac number, because 25391516415015 - 2⁹ = 25391516414503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25391516415017) 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, 2291641 + ... + 7485629.

It is an arithmetic number, because the mean of its divisors is an integer number (1300704945750).

Almost surely, 2^{25391516415015} is an apocalyptic number.

25391516415015 is a deficient number, since it is larger than the sum of its proper divisors (16231041848985).

25391516415015 is a wasteful number, since it uses less digits than its factorization.

25391516415015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5201987.

The product of its (nonzero) digits is 810000, while the sum is 48.

The spelling of 25391516415015 in words is "twenty-five trillion, three hundred ninety-one billion, five hundred sixteen million, four hundred fifteen thousand, fifteen".