25423526615 has 32 divisors (see below), whose sum is σ = 32041481472. Its totient is φ = 19343520000.

The previous prime is 25423526603. The next prime is 25423526621. The reversal of 25423526615 is 51662532452.

It is not a de Polignac number, because 25423526615 - 2²² = 25419332311 is a prime.

It is a super-2 number, since 2×25423526615² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

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, 5030840 + ... + 5035890.

It is an arithmetic number, because the mean of its divisors is an integer number (1001296296).

Almost surely, 2^25423526615 is an apocalyptic number.

25423526615 is a deficient number, since it is larger than the sum of its proper divisors (6617954857).

25423526615 is a wasteful number, since it uses less digits than its factorization.

25423526615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711.

The product of its digits is 432000, while the sum is 41.

The spelling of 25423526615 in words is "twenty-five billion, four hundred twenty-three million, five hundred twenty-six thousand, six hundred fifteen".