39720364724 has 6 divisors (see below), whose sum is σ = 69510638274. Its totient is φ = 19860182360.

The previous prime is 39720364693. The next prime is 39720364729. The reversal of 39720364724 is 42746302793.

39720364724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 38521127824 + 1199236900 = 196268^2 + 34630^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39720364729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4965045587 + ... + 4965045594.

It is an arithmetic number, because the mean of its divisors is an integer number (11585106379).

Almost surely, 2^39720364724 is an apocalyptic number.

It is an amenable number.

39720364724 is a deficient number, since it is larger than the sum of its proper divisors (29790273550).

39720364724 is a wasteful number, since it uses less digits than its factorization.

39720364724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9930091185 (or 9930091183 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 47.

The spelling of 39720364724 in words is "thirty-nine billion, seven hundred twenty million, three hundred sixty-four thousand, seven hundred twenty-four".