69638739091 has 4 divisors (see below), whose sum is σ = 69812402184. Its totient is φ = 69465076000.

The previous prime is 69638739073. The next prime is 69638739101. The reversal of 69638739091 is 19093783696.

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 69638739091 - 2³¹ = 67491255443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69638739011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86830945 + ... + 86831746.

It is an arithmetic number, because the mean of its divisors is an integer number (17453100546).

Almost surely, 2^69638739091 is an apocalyptic number.

69638739091 is a deficient number, since it is larger than the sum of its proper divisors (173663093).

69638739091 is a wasteful number, since it uses less digits than its factorization.

69638739091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173663092.

The product of its (nonzero) digits is 13226976, while the sum is 61.

The spelling of 69638739091 in words is "sixty-nine billion, six hundred thirty-eight million, seven hundred thirty-nine thousand, ninety-one".