39981504725 has 12 divisors (see below), whose sum is σ = 49581887940. Its totient is φ = 31982092800.

The previous prime is 39981504713. The next prime is 39981504751. The reversal of 39981504725 is 52740518993.

39981504725 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 6 ways, for example, as 4301476 + 39977203249 = 2074^2 + 199943^2 .

It is not a de Polignac number, because 39981504725 - 2⁸ = 39981504469 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204485 + ... + 348965.

It is an arithmetic number, because the mean of its divisors is an integer number (4131823995).

Almost surely, 2^39981504725 is an apocalyptic number.

It is an amenable number.

39981504725 is a deficient number, since it is larger than the sum of its proper divisors (9600383215).

39981504725 is a wasteful number, since it uses less digits than its factorization.

39981504725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155560 (or 155555 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 39981504725 in words is "thirty-nine billion, nine hundred eighty-one million, five hundred four thousand, seven hundred twenty-five".