16629490431 has 12 divisors (see below), whose sum is σ = 24910018952. Its totient is φ = 11086326792.

The previous prime is 16629490393. The next prime is 16629490477. The reversal of 16629490431 is 13409492661.

16629490431 is a `hidden beast` number, since 16 + 629 + 4 + 9 + 0 + 4 + 3 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-16629490431 is a prime.

It is a super-2 number, since 2×16629490431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16629495431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34216816 + ... + 34217301.

Almost surely, 2^16629490431 is an apocalyptic number.

16629490431 is a deficient number, since it is larger than the sum of its proper divisors (8280528521).

16629490431 is an frugal number, since it uses more digits than its factorization.

16629490431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68434132 (or 68434120 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 16629490431 in words is "sixteen billion, six hundred twenty-nine million, four hundred ninety thousand, four hundred thirty-one".