16421690079 has 12 divisors (see below), whose sum is σ = 23721336600. Its totient is φ = 10947277584.

The previous prime is 16421690059. The next prime is 16421690093. The reversal of 16421690079 is 97009612461.

It is not a de Polignac number, because 16421690079 - 2⁷ = 16421689951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16421690009) 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, 319812 + ... + 367590.

It is an arithmetic number, because the mean of its divisors is an integer number (1976778050).

Almost surely, 2^16421690079 is an apocalyptic number.

16421690079 is a deficient number, since it is larger than the sum of its proper divisors (7299646521).

16421690079 is a wasteful number, since it uses less digits than its factorization.

16421690079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85974 (or 85971 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 16421690079 in words is "sixteen billion, four hundred twenty-one million, six hundred ninety thousand, seventy-nine".