39255212640 has 96 divisors (see below), whose sum is σ = 141318777600. Its totient is φ = 8972619264.

The previous prime is 39255212629. The next prime is 39255212657. The reversal of 39255212640 is 4621255293.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5838190 + ... + 5844909.

It is an arithmetic number, because the mean of its divisors is an integer number (1472070600).

Almost surely, 2^39255212640 is an apocalyptic number.

39255212640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39255212640 is an abundant number, since it is smaller than the sum of its proper divisors (102063564960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39255212640 is a wasteful number, since it uses less digits than its factorization.

39255212640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11683124 (or 11683116 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 39255212640 in words is "thirty-nine billion, two hundred fifty-five million, two hundred twelve thousand, six hundred forty".