87031551645665 has 48 divisors (see below), whose sum is σ = 117785075890944. Its totient is φ = 61655217845760.

The previous prime is 87031551645641. The next prime is 87031551645673. The reversal of 87031551645665 is 56654615513078.

It is not a de Polignac number, because 87031551645665 - 2⁶ = 87031551645601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87031551645598 and 87031551645607.

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, 4989689 + ... + 14105321.

It is an arithmetic number, because the mean of its divisors is an integer number (2453855747728).

Almost surely, 2^{87031551645665} is an apocalyptic number.

It is an amenable number.

87031551645665 is a deficient number, since it is larger than the sum of its proper divisors (30753524245279).

87031551645665 is a wasteful number, since it uses less digits than its factorization.

87031551645665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9116070 (or 9116059 counting only the distinct ones).

The product of its (nonzero) digits is 90720000, while the sum is 62.

The spelling of 87031551645665 in words is "eighty-seven trillion, thirty-one billion, five hundred fifty-one million, six hundred forty-five thousand, six hundred sixty-five".