64620477752 has 64 divisors (see below), whose sum is σ = 123700176000. Its totient is φ = 31641007104.

The previous prime is 64620477743. The next prime is 64620477841. The reversal of 64620477752 is 25777402646.

It is a super-2 number, since 2×64620477752² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64620477752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91142774 + ... + 91143482.

It is an arithmetic number, because the mean of its divisors is an integer number (1932815250).

Almost surely, 2^64620477752 is an apocalyptic number.

It is an amenable number.

64620477752 is a deficient number, since it is larger than the sum of its proper divisors (59079698248).

64620477752 is a wasteful number, since it uses less digits than its factorization.

64620477752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680 (or 1676 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 50.

The spelling of 64620477752 in words is "sixty-four billion, six hundred twenty million, four hundred seventy-seven thousand, seven hundred fifty-two".