25938506475 has 216 divisors, whose sum is σ = 56806364160. Its totient is φ = 11696892480.

The previous prime is 25938506471. The next prime is 25938506491. The reversal of 25938506475 is 57460583952.

25938506475 is a `hidden beast` number, since 2 + 5 + 93 + 8 + 506 + 47 + 5 = 666.

It is not a de Polignac number, because 25938506475 - 2² = 25938506471 is a prime.

It is a super-2 number, since 2×25938506475² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25938506471) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 23515774 + ... + 23516876.

Almost surely, 2^25938506475 is an apocalyptic number.

25938506475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25938506475 is an abundant number, since it is smaller than the sum of its proper divisors (30867857685).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25938506475 is a wasteful number, since it uses less digits than its factorization.

25938506475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221 (or 1197 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 25938506475 in words is "twenty-five billion, nine hundred thirty-eight million, five hundred six thousand, four hundred seventy-five".