87730156640 has 72 divisors (see below), whose sum is σ = 241101291312. Its totient is φ = 30078908160.

The previous prime is 87730156601. The next prime is 87730156669. The reversal of 87730156640 is 4665103778.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 5587196 + ... + 5602875.

It is an arithmetic number, because the mean of its divisors is an integer number (3348629046).

Almost surely, 2^87730156640 is an apocalyptic number.

87730156640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87730156640 is an abundant number, since it is smaller than the sum of its proper divisors (153371134672).

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

87730156640 is a wasteful number, since it uses less digits than its factorization.

87730156640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11190100 (or 11190085 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 87730156640 in words is "eighty-seven billion, seven hundred thirty million, one hundred fifty-six thousand, six hundred forty".