87135998160 has 40 divisors (see below), whose sum is σ = 270121595040. Its totient is φ = 23236266112.

The previous prime is 87135998141. The next prime is 87135998171. The reversal of 87135998160 is 6189953178.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 87135998160.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181533090 + ... + 181533569.

It is an arithmetic number, because the mean of its divisors is an integer number (6753039876).

Almost surely, 2^87135998160 is an apocalyptic number.

87135998160 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87135998160 is an abundant number, since it is smaller than the sum of its proper divisors (182985596880).

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

87135998160 is a wasteful number, since it uses less digits than its factorization.

87135998160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363066675 (or 363066669 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 57.

The spelling of 87135998160 in words is "eighty-seven billion, one hundred thirty-five million, nine hundred ninety-eight thousand, one hundred sixty".