15616649049 has 8 divisors (see below), whose sum is σ = 20937239232. Its totient is φ = 10353579120.

The previous prime is 15616649033. The next prime is 15616649051. The reversal of 15616649049 is 94094661651.

It is a happy number.

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

It is not a de Polignac number, because 15616649049 - 2⁴ = 15616649033 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15616648992 and 15616649010.

It is not an unprimeable number, because it can be changed into a prime (15616649099) 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, 14379429 + ... + 14380514.

It is an arithmetic number, because the mean of its divisors is an integer number (2617154904).

Almost surely, 2^15616649049 is an apocalyptic number.

It is an amenable number.

15616649049 is a deficient number, since it is larger than the sum of its proper divisors (5320590183).

15616649049 is a wasteful number, since it uses less digits than its factorization.

15616649049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28760127.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 15616649049 in words is "fifteen billion, six hundred sixteen million, six hundred forty-nine thousand, forty-nine".