87037878640 has 80 divisors (see below), whose sum is σ = 209881432800. Its totient is φ = 33527868416.

The previous prime is 87037878637. The next prime is 87037878679. The reversal of 87037878640 is 4687873078.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 854259 + ... + 950701.

It is an arithmetic number, because the mean of its divisors is an integer number (2623517910).

Almost surely, 2^87037878640 is an apocalyptic number.

87037878640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87037878640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104940716400).

87037878640 is an abundant number, since it is smaller than the sum of its proper divisors (122843554160).

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

87037878640 is a wasteful number, since it uses less digits than its factorization.

87037878640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96874 (or 96868 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 58.

The spelling of 87037878640 in words is "eighty-seven billion, thirty-seven million, eight hundred seventy-eight thousand, six hundred forty".