15974645813 has 8 divisors (see below), whose sum is σ = 18681313728. Its totient is φ = 13374121824.

The previous prime is 15974645801. The next prime is 15974645821. The reversal of 15974645813 is 31854647951.

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

It is not a de Polignac number, because 15974645813 - 2¹⁰ = 15974644789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15974645873) 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, 26535656 + ... + 26536257.

It is an arithmetic number, because the mean of its divisors is an integer number (2335164216).

Almost surely, 2^15974645813 is an apocalyptic number.

It is an amenable number.

15974645813 is a deficient number, since it is larger than the sum of its proper divisors (2706667915).

15974645813 is an equidigital number, since it uses as much as digits as its factorization.

15974645813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53071963.

The product of its digits is 3628800, while the sum is 53.

The spelling of 15974645813 in words is "fifteen billion, nine hundred seventy-four million, six hundred forty-five thousand, eight hundred thirteen".