69121712816 has 40 divisors (see below), whose sum is σ = 144908735664. Its totient is φ = 31751112960.

The previous prime is 69121712809. The next prime is 69121712839. The reversal of 69121712816 is 61821712196.

It is a super-2 number, since 2×69121712816² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 743591 + ... + 831366.

Almost surely, 2^69121712816 is an apocalyptic number.

It is an amenable number.

69121712816 is an abundant number, since it is smaller than the sum of its proper divisors (75787022848).

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

69121712816 is a wasteful number, since it uses less digits than its factorization.

69121712816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575189 (or 1575183 counting only the distinct ones).

The product of its digits is 72576, while the sum is 44.

The spelling of 69121712816 in words is "sixty-nine billion, one hundred twenty-one million, seven hundred twelve thousand, eight hundred sixteen".