87525758781 has 48 divisors (see below), whose sum is σ = 130324187136. Its totient is φ = 56586636288.

The previous prime is 87525758767. The next prime is 87525758791. The reversal of 87525758781 is 18785752578.

87525758781 is a `hidden beast` number, since 8 + 7 + 52 + 575 + 8 + 7 + 8 + 1 = 666.

It is not a de Polignac number, because 87525758781 - 2⁶ = 87525758717 is a prime.

It is a super-2 number, since 2×87525758781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87525758711) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9423966 + ... + 9433248.

It is an arithmetic number, because the mean of its divisors is an integer number (2715087232).

Almost surely, 2^87525758781 is an apocalyptic number.

It is an amenable number.

87525758781 is a deficient number, since it is larger than the sum of its proper divisors (42798428355).

87525758781 is a wasteful number, since it uses less digits than its factorization.

87525758781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9602 (or 9599 counting only the distinct ones).

The product of its digits is 43904000, while the sum is 63.

The spelling of 87525758781 in words is "eighty-seven billion, five hundred twenty-five million, seven hundred fifty-eight thousand, seven hundred eighty-one".