39459521985 has 32 divisors (see below), whose sum is σ = 68001548160. Its totient is φ = 19423438848.

The previous prime is 39459521939. The next prime is 39459521987. The reversal of 39459521985 is 58912595493.

39459521985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39459521985 - 2⁶ = 39459521921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39459521987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2256606 + ... + 2274024.

It is an arithmetic number, because the mean of its divisors is an integer number (2125048380).

Almost surely, 2^39459521985 is an apocalyptic number.

It is an amenable number.

39459521985 is a deficient number, since it is larger than the sum of its proper divisors (28542026175).

39459521985 is a wasteful number, since it uses less digits than its factorization.

39459521985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29057.

The product of its digits is 17496000, while the sum is 60.

The spelling of 39459521985 in words is "thirty-nine billion, four hundred fifty-nine million, five hundred twenty-one thousand, nine hundred eighty-five".