86640505012 has 24 divisors (see below), whose sum is σ = 152362246400. Its totient is φ = 43108592256.

The previous prime is 86640504991. The next prime is 86640505019. The reversal of 86640505012 is 21050504668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86640505019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2353564 + ... + 2390092.

Almost surely, 2^86640505012 is an apocalyptic number.

It is an amenable number.

86640505012 is a deficient number, since it is larger than the sum of its proper divisors (65721741388).

86640505012 is a wasteful number, since it uses less digits than its factorization.

86640505012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39415 (or 39413 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 86640505012 in words is "eighty-six billion, six hundred forty million, five hundred five thousand, twelve".