39507481664 has 42 divisors (see below), whose sum is σ = 91197283950. Its totient is φ = 16931776512.

The previous prime is 39507481591. The next prime is 39507481709. The reversal of 39507481664 is 46618470593.

It can be written as a sum of positive squares in only one way, i.e., 33491928064 + 6015553600 = 183008^2 + 77560^2 .

It is a super-2 number, since 2×39507481664² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6295889 + ... + 6302160.

Almost surely, 2^39507481664 is an apocalyptic number.

It is an amenable number.

39507481664 is an abundant number, since it is smaller than the sum of its proper divisors (51689802286).

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

39507481664 is a wasteful number, since it uses less digits than its factorization.

39507481664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12598075 (or 12598058 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 39507481664 in words is "thirty-nine billion, five hundred seven million, four hundred eighty-one thousand, six hundred sixty-four".