16487797913 has 4 divisors (see below), whose sum is σ = 16488089268. Its totient is φ = 16487506560.

The previous prime is 16487797891. The next prime is 16487797927. The reversal of 16487797913 is 31979778461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13344177289 + 3143620624 = 115517^2 + 56068^2 .

It is a cyclic number.

It is not a de Polignac number, because 16487797913 - 2⁶ = 16487797849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16487797013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30368 + ... + 184113.

It is an arithmetic number, because the mean of its divisors is an integer number (4122022317).

Almost surely, 2^16487797913 is an apocalyptic number.

It is an amenable number.

16487797913 is a deficient number, since it is larger than the sum of its proper divisors (291355).

16487797913 is an equidigital number, since it uses as much as digits as its factorization.

16487797913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291354.

The product of its digits is 16003008, while the sum is 62.

The spelling of 16487797913 in words is "sixteen billion, four hundred eighty-seven million, seven hundred ninety-seven thousand, nine hundred thirteen".