16722745631 has 8 divisors (see below), whose sum is σ = 17735885664. Its totient is φ = 15733444320.

The previous prime is 16722745621. The next prime is 16722745661. The reversal of 16722745631 is 13654722761.

It is a happy number.

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-16722745631 is a prime.

It is a super-2 number, since 2×16722745631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16722745621) 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, 5958236 + ... + 5961041.

It is an arithmetic number, because the mean of its divisors is an integer number (2216985708).

Almost surely, 2^16722745631 is an apocalyptic number.

16722745631 is a deficient number, since it is larger than the sum of its proper divisors (1013140033).

16722745631 is a wasteful number, since it uses less digits than its factorization.

16722745631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11919361.

The product of its digits is 423360, while the sum is 44.

The spelling of 16722745631 in words is "sixteen billion, seven hundred twenty-two million, seven hundred forty-five thousand, six hundred thirty-one".