16431625717 has 8 divisors (see below), whose sum is σ = 17711891456. Its totient is φ = 15153687792.

The previous prime is 16431625643. The next prime is 16431625747. The reversal of 16431625717 is 71752613461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16431625717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16431625747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567273 + ... + 595534.

It is an arithmetic number, because the mean of its divisors is an integer number (2213986432).

Almost surely, 2^16431625717 is an apocalyptic number.

It is an amenable number.

16431625717 is a deficient number, since it is larger than the sum of its proper divisors (1280265739).

16431625717 is a wasteful number, since it uses less digits than its factorization.

16431625717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163907.

The product of its digits is 211680, while the sum is 43.

The spelling of 16431625717 in words is "sixteen billion, four hundred thirty-one million, six hundred twenty-five thousand, seven hundred seventeen".