15091255491 has 32 divisors (see below), whose sum is σ = 22121709120. Its totient is φ = 9094464000.

The previous prime is 15091255477. The next prime is 15091255507. The reversal of 15091255491 is 19455219051.

It is not a de Polignac number, because 15091255491 - 2²⁷ = 14957037763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15091255891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 530941 + ... + 558641.

It is an arithmetic number, because the mean of its divisors is an integer number (691303410).

Almost surely, 2^15091255491 is an apocalyptic number.

15091255491 is a deficient number, since it is larger than the sum of its proper divisors (7030453629).

15091255491 is a wasteful number, since it uses less digits than its factorization.

15091255491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28007.

The product of its (nonzero) digits is 81000, while the sum is 42.

It can be divided in two parts, 150912 and 55491, that added together give a triangular number (206403 = T₆₄₂).

The spelling of 15091255491 in words is "fifteen billion, ninety-one million, two hundred fifty-five thousand, four hundred ninety-one".