87640622465 has 24 divisors (see below), whose sum is σ = 118058290560. Its totient is φ = 62382473120.

The previous prime is 87640622417. The next prime is 87640622477. The reversal of 87640622465 is 56422604678.

It is a de Polignac number, because none of the positive numbers 2^k-87640622465 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1512635 + ... + 1569504.

It is an arithmetic number, because the mean of its divisors is an integer number (4919095440).

Almost surely, 2^87640622465 is an apocalyptic number.

It is an amenable number.

87640622465 is a deficient number, since it is larger than the sum of its proper divisors (30417668095).

87640622465 is a wasteful number, since it uses less digits than its factorization.

87640622465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3082213 (or 3082202 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 50.

The spelling of 87640622465 in words is "eighty-seven billion, six hundred forty million, six hundred twenty-two thousand, four hundred sixty-five".