64720940942872 has 16 divisors (see below), whose sum is σ = 124311563397000. Its totient is φ = 31571190703680.

The previous prime is 64720940942863. The next prime is 64720940942899. The reversal of 64720940942872 is 27824904902746.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98659970622 + ... + 98659971277.

Almost surely, 2^{64720940942872} is an apocalyptic number.

It is an amenable number.

64720940942872 is a deficient number, since it is larger than the sum of its proper divisors (59590622454128).

64720940942872 is a wasteful number, since it uses less digits than its factorization.

64720940942872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197319941946 (or 197319941942 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 64.

The spelling of 64720940942872 in words is "sixty-four trillion, seven hundred twenty billion, nine hundred forty million, nine hundred forty-two thousand, eight hundred seventy-two".