15139078491 has 16 divisors (see below), whose sum is σ = 20687814144. Its totient is φ = 9843049824.

The previous prime is 15139078463. The next prime is 15139078511. The reversal of 15139078491 is 19487093151.

It is not a de Polignac number, because 15139078491 - 2¹⁹ = 15138554203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15139078491.

It is not an unprimeable number, because it can be changed into a prime (15139078411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149796 + ... + 229601.

It is an arithmetic number, because the mean of its divisors is an integer number (1292988384).

Almost surely, 2^15139078491 is an apocalyptic number.

15139078491 is a deficient number, since it is larger than the sum of its proper divisors (5548735653).

15139078491 is a wasteful number, since it uses less digits than its factorization.

15139078491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379730.

The product of its (nonzero) digits is 272160, while the sum is 48.

The spelling of 15139078491 in words is "fifteen billion, one hundred thirty-nine million, seventy-eight thousand, four hundred ninety-one".