39508785872 has 10 divisors (see below), whose sum is σ = 76548272658. Its totient is φ = 19754392928.

The previous prime is 39508785871. The next prime is 39508785881. The reversal of 39508785872 is 27858780593.

It can be written as a sum of positive squares in only one way, i.e., 28846984336 + 10661801536 = 169844^2 + 103256^2 .

It is a super-2 number, since 2×39508785872² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39508785871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1234649543 + ... + 1234649574.

Almost surely, 2^39508785872 is an apocalyptic number.

It is an amenable number.

39508785872 is a deficient number, since it is larger than the sum of its proper divisors (37039486786).

39508785872 is a wasteful number, since it uses less digits than its factorization.

39508785872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2469299125 (or 2469299119 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 62.

The spelling of 39508785872 in words is "thirty-nine billion, five hundred eight million, seven hundred eighty-five thousand, eight hundred seventy-two".