239539306651 has 4 divisors (see below), whose sum is σ = 252146638600. Its totient is φ = 226931974704.

The previous prime is 239539306579. The next prime is 239539306673. The reversal of 239539306651 is 156603935932.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 239539306651 - 2³¹ = 237391823003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239539306681) 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, 6303665946 + ... + 6303665983.

It is an arithmetic number, because the mean of its divisors is an integer number (63036659650).

Almost surely, 2^239539306651 is an apocalyptic number.

239539306651 is a deficient number, since it is larger than the sum of its proper divisors (12607331949).

239539306651 is a wasteful number, since it uses less digits than its factorization.

239539306651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12607331948.

The product of its (nonzero) digits is 3936600, while the sum is 52.

The spelling of 239539306651 in words is "two hundred thirty-nine billion, five hundred thirty-nine million, three hundred six thousand, six hundred fifty-one".