16516195791 has 16 divisors (see below), whose sum is σ = 22276879968. Its totient is φ = 10883520000.

The previous prime is 16516195783. The next prime is 16516195799. The reversal of 16516195791 is 19759161561.

It is an interprime number because it is at equal distance from previous prime (16516195783) and next prime (16516195799).

It is not a de Polignac number, because 16516195791 - 2³ = 16516195783 is a prime.

It is a super-2 number, since 2×16516195791² (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 (16516195799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136755 + ... + 227451.

It is an arithmetic number, because the mean of its divisors is an integer number (1392304998).

Almost surely, 2^16516195791 is an apocalyptic number.

16516195791 is a deficient number, since it is larger than the sum of its proper divisors (5760684177).

16516195791 is a wasteful number, since it uses less digits than its factorization.

16516195791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91402.

The product of its digits is 510300, while the sum is 51.

The spelling of 16516195791 in words is "sixteen billion, five hundred sixteen million, one hundred ninety-five thousand, seven hundred ninety-one".