87137005040778 has 96 divisors (see below), whose sum is σ = 221243411793600. Its totient is φ = 22624107018240.

The previous prime is 87137005040699. The next prime is 87137005040791. The reversal of 87137005040778 is 87704050073178.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2958250 + ... + 13528682.

It is an arithmetic number, because the mean of its divisors is an integer number (2304618872850).

Almost surely, 2^{87137005040778} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87137005040778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110621705896800).

87137005040778 is an abundant number, since it is smaller than the sum of its proper divisors (134106406752822).

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

87137005040778 is a wasteful number, since it uses less digits than its factorization.

87137005040778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10573012 (or 10573005 counting only the distinct ones).

The product of its (nonzero) digits is 9219840, while the sum is 57.

The spelling of 87137005040778 in words is "eighty-seven trillion, one hundred thirty-seven billion, five million, forty thousand, seven hundred seventy-eight".