25591237485 has 64 divisors (see below), whose sum is σ = 46794240000. Its totient is φ = 11828194560.

The previous prime is 25591237439. The next prime is 25591237493. The reversal of 25591237485 is 58473219552.

It is not a de Polignac number, because 25591237485 - 2¹² = 25591233389 is a prime.

It is a super-2 number, since 2×25591237485² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 344166 + ... + 411864.

It is an arithmetic number, because the mean of its divisors is an integer number (731160000).

Almost surely, 2^25591237485 is an apocalyptic number.

It is an amenable number.

25591237485 is a deficient number, since it is larger than the sum of its proper divisors (21203002515).

25591237485 is a wasteful number, since it uses less digits than its factorization.

25591237485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67826.

The product of its digits is 3024000, while the sum is 51.

The spelling of 25591237485 in words is "twenty-five billion, five hundred ninety-one million, two hundred thirty-seven thousand, four hundred eighty-five".