16615742013 has 54 divisors (see below), whose sum is σ = 27495763022. Its totient is φ = 9609868800.

The previous prime is 16615741991. The next prime is 16615742023. The reversal of 16615742013 is 31024751661.

16615742013 is a `hidden beast` number, since 1 + 6 + 61 + 574 + 20 + 1 + 3 = 666.

It can be written as a sum of positive squares in 9 ways, for example, as 210743289 + 16404998724 = 14517^2 + 128082^2 .

It is not a de Polignac number, because 16615742013 - 2²⁵ = 16582187581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16615742023) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 23702563 + ... + 23703263.

Almost surely, 2^16615742013 is an apocalyptic number.

16615742013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16615742013 is a deficient number, since it is larger than the sum of its proper divisors (10880021009).

16615742013 is an equidigital number, since it uses as much as digits as its factorization.

16615742013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 16615742013 in words is "sixteen billion, six hundred fifteen million, seven hundred forty-two thousand, thirteen".