716636512121 has 4 divisors (see below), whose sum is σ = 716693952000. Its totient is φ = 716579072244.

The previous prime is 716636512117. The next prime is 716636512139. The reversal of 716636512121 is 121215636617.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 716636512121 - 2² = 716636512117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (716636512721) 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, 28701221 + ... + 28726178.

It is an arithmetic number, because the mean of its divisors is an integer number (179173488000).

Almost surely, 2^716636512121 is an apocalyptic number.

It is an amenable number.

716636512121 is a deficient number, since it is larger than the sum of its proper divisors (57439879).

716636512121 is a wasteful number, since it uses less digits than its factorization.

716636512121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57439878.

The product of its digits is 90720, while the sum is 41.

The spelling of 716636512121 in words is "seven hundred sixteen billion, six hundred thirty-six million, five hundred twelve thousand, one hundred twenty-one".