16997792581 has 8 divisors (see below), whose sum is σ = 21192053184. Its totient is φ = 13245033120.

The previous prime is 16997792573. The next prime is 16997792653. The reversal of 16997792581 is 18529779961.

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

It is not a de Polignac number, because 16997792581 - 2³ = 16997792573 is a prime.

It is a super-2 number, since 2×16997792581² (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 (16997792531) 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, 110375200 + ... + 110375353.

It is an arithmetic number, because the mean of its divisors is an integer number (2649006648).

Almost surely, 2^16997792581 is an apocalyptic number.

16997792581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16997792581 is a deficient number, since it is larger than the sum of its proper divisors (4194260603).

16997792581 is a wasteful number, since it uses less digits than its factorization.

16997792581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220750571.

The product of its digits is 17146080, while the sum is 64.

The spelling of 16997792581 in words is "sixteen billion, nine hundred ninety-seven million, seven hundred ninety-two thousand, five hundred eighty-one".