39216578641 has 4 divisors (see below), whose sum is σ = 39457171312. Its totient is φ = 38975985972.

The previous prime is 39216578627. The next prime is 39216578669. The reversal of 39216578641 is 14687561293.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39216578641 - 2²³ = 39208190033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39216570641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120296091 + ... + 120296416.

It is an arithmetic number, because the mean of its divisors is an integer number (9864292828).

Almost surely, 2^39216578641 is an apocalyptic number.

It is an amenable number.

39216578641 is a deficient number, since it is larger than the sum of its proper divisors (240592671).

39216578641 is a wasteful number, since it uses less digits than its factorization.

39216578641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240592670.

The product of its digits is 2177280, while the sum is 52.

The spelling of 39216578641 in words is "thirty-nine billion, two hundred sixteen million, five hundred seventy-eight thousand, six hundred forty-one".