69139502906 has 4 divisors (see below), whose sum is σ = 103709254362. Its totient is φ = 34569751452.

The previous prime is 69139502869. The next prime is 69139502909. The reversal of 69139502906 is 60920593196.

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

It can be written as a sum of positive squares in only one way, i.e., 68181043225 + 958459681 = 261115^2 + 30959^2 .

It is not an unprimeable number, because it can be changed into a prime (69139502909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17284875725 + ... + 17284875728.

Almost surely, 2^69139502906 is an apocalyptic number.

69139502906 is a deficient number, since it is larger than the sum of its proper divisors (34569751456).

69139502906 is a wasteful number, since it uses less digits than its factorization.

69139502906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34569751455.

The product of its (nonzero) digits is 787320, while the sum is 50.

The spelling of 69139502906 in words is "sixty-nine billion, one hundred thirty-nine million, five hundred two thousand, nine hundred six".