87661262016 has 56 divisors (see below), whose sum is σ = 257707881840. Its totient is φ = 29220420096.

The previous prime is 87661261993. The next prime is 87661262021. The reversal of 87661262016 is 61026216678.

87661262016 is a `hidden beast` number, since 8 + 7 + 6 + 6 + 1 + 2 + 620 + 16 = 666.

It is a super-3 number, since 3×87661262016³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25363221 + ... + 25366676.

Almost surely, 2^87661262016 is an apocalyptic number.

It is an amenable number.

87661262016 is an abundant number, since it is smaller than the sum of its proper divisors (170046619824).

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

87661262016 is a wasteful number, since it uses less digits than its factorization.

87661262016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50729918 (or 50729902 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 87661262016 in words is "eighty-seven billion, six hundred sixty-one million, two hundred sixty-two thousand, sixteen".