15849788491 has 8 divisors (see below), whose sum is σ = 15928686144. Its totient is φ = 15770926920.

The previous prime is 15849788473. The next prime is 15849788567. The reversal of 15849788491 is 19488794851.

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

It is a cyclic number.

It is not a de Polignac number, because 15849788491 - 2⁵ = 15849788459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15849788401) 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, 1434996 + ... + 1445998.

It is an arithmetic number, because the mean of its divisors is an integer number (1991085768).

Almost surely, 2^15849788491 is an apocalyptic number.

15849788491 is a deficient number, since it is larger than the sum of its proper divisors (78897653).

15849788491 is a wasteful number, since it uses less digits than its factorization.

15849788491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18041.

The product of its digits is 23224320, while the sum is 64.

The spelling of 15849788491 in words is "fifteen billion, eight hundred forty-nine million, seven hundred eighty-eight thousand, four hundred ninety-one".