87575840425 has 48 divisors (see below), whose sum is σ = 115699259952. Its totient is φ = 65529446400.

The previous prime is 87575840419. The next prime is 87575840447. The reversal of 87575840425 is 52404857578.

It can be written as a sum of positive squares in 24 ways, for example, as 26554983849 + 61020856576 = 162957^2 + 247024^2 .

It is not a de Polignac number, because 87575840425 - 2²¹ = 87573743273 is a prime.

It is a super-2 number, since 2×87575840425² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72197119 + ... + 72198331.

It is an arithmetic number, because the mean of its divisors is an integer number (2410401249).

Almost surely, 2^87575840425 is an apocalyptic number.

87575840425 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

87575840425 is a deficient number, since it is larger than the sum of its proper divisors (28123419527).

87575840425 is a wasteful number, since it uses less digits than its factorization.

87575840425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158 (or 2153 counting only the distinct ones).

The product of its (nonzero) digits is 12544000, while the sum is 55.

The spelling of 87575840425 in words is "eighty-seven billion, five hundred seventy-five million, eight hundred forty thousand, four hundred twenty-five".