16369794981 has 32 divisors (see below), whose sum is σ = 25346563200. Its totient is φ = 10428203520.

The previous prime is 16369794979. The next prime is 16369795019. The reversal of 16369794981 is 18949796361.

16369794981 is a `hidden beast` number, since 16 + 3 + 69 + 79 + 498 + 1 = 666.

It is not a de Polignac number, because 16369794981 - 2¹ = 16369794979 is a prime.

It is a super-2 number, since 2×16369794981² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16369794901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31815 + ... + 183716.

It is an arithmetic number, because the mean of its divisors is an integer number (792080100).

Almost surely, 2^16369794981 is an apocalyptic number.

It is an amenable number.

16369794981 is a deficient number, since it is larger than the sum of its proper divisors (8976768219).

16369794981 is a wasteful number, since it uses less digits than its factorization.

16369794981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215666 (or 215660 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 63.

The spelling of 16369794981 in words is "sixteen billion, three hundred sixty-nine million, seven hundred ninety-four thousand, nine hundred eighty-one".