15849871551 has 12 divisors (see below), whose sum is σ = 22895352480. Its totient is φ = 10566076320.

The previous prime is 15849871529. The next prime is 15849871627. The reversal of 15849871551 is 15517894851.

15849871551 is a `hidden beast` number, since 1 + 5 + 8 + 4 + 9 + 87 + 1 + 551 = 666.

It is not a de Polignac number, because 15849871551 - 2¹⁵ = 15849838783 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15849871151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330730 + ... + 375608.

It is an arithmetic number, because the mean of its divisors is an integer number (1907946040).

Almost surely, 2^15849871551 is an apocalyptic number.

15849871551 is a deficient number, since it is larger than the sum of its proper divisors (7045480929).

15849871551 is a wasteful number, since it uses less digits than its factorization.

15849871551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84126 (or 84123 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 54.

The spelling of 15849871551 in words is "fifteen billion, eight hundred forty-nine million, eight hundred seventy-one thousand, five hundred fifty-one".