64729651672 has 32 divisors (see below), whose sum is σ = 142089484320. Its totient is φ = 27064661760.

The previous prime is 64729651627. The next prime is 64729651703. The reversal of 64729651672 is 27615692746.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14093883 + ... + 14098474.

It is an arithmetic number, because the mean of its divisors is an integer number (4440296385).

Almost surely, 2^64729651672 is an apocalyptic number.

It is an amenable number.

64729651672 is an abundant number, since it is smaller than the sum of its proper divisors (77359832648).

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

64729651672 is a wasteful number, since it uses less digits than its factorization.

64729651672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28192411 (or 28192407 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 55.

The spelling of 64729651672 in words is "sixty-four billion, seven hundred twenty-nine million, six hundred fifty-one thousand, six hundred seventy-two".