69991056 has 60 divisors (see below), whose sum is σ = 202209280. Its totient is φ = 22576320.

The previous prime is 69991049. The next prime is 69991069. The reversal of 69991056 is 65019996.

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 11 ways as a sum of consecutive naturals, for example, 3376 + ... + 12303.

Almost surely, 2^69991056 is an apocalyptic number.

It is an amenable number.

69991056 is an abundant number, since it is smaller than the sum of its proper divisors (132218224).

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

69991056 is a wasteful number, since it uses less digits than its factorization.

69991056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15724 (or 15715 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 69991056 is about 8366.0657420319. The cubic root of 69991056 is about 412.1109764829.

The spelling of 69991056 in words is "sixty-nine million, nine hundred ninety-one thousand, fifty-six".