39736700721 has 6 divisors (see below), whose sum is σ = 57397456610. Its totient is φ = 26491133808.

The previous prime is 39736700701. The next prime is 39736700737. The reversal of 39736700721 is 12700763793.

It can be written as a sum of positive squares in only one way, i.e., 38171390625 + 1565310096 = 195375^2 + 39564^2 .

It is not a de Polignac number, because 39736700721 - 2⁷ = 39736700593 is a prime.

It is a super-3 number, since 3×39736700721³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39736700701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2207594476 + ... + 2207594493.

Almost surely, 2^39736700721 is an apocalyptic number.

It is an amenable number.

39736700721 is a deficient number, since it is larger than the sum of its proper divisors (17660755889).

39736700721 is a wasteful number, since it uses less digits than its factorization.

39736700721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4415188975 (or 4415188972 counting only the distinct ones).

The product of its (nonzero) digits is 333396, while the sum is 45.

The spelling of 39736700721 in words is "thirty-nine billion, seven hundred thirty-six million, seven hundred thousand, seven hundred twenty-one".