15139257427 has 4 divisors (see below), whose sum is σ = 17302008496. Its totient is φ = 12976506360.

The previous prime is 15139257407. The next prime is 15139257431. The reversal of 15139257427 is 72475293151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72475293151 = 32533 ⋅2227747.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15139257427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15139257407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081375524 + ... + 1081375537.

It is an arithmetic number, because the mean of its divisors is an integer number (4325502124).

Almost surely, 2^15139257427 is an apocalyptic number.

15139257427 is a deficient number, since it is larger than the sum of its proper divisors (2162751069).

15139257427 is an equidigital number, since it uses as much as digits as its factorization.

15139257427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162751068.

The product of its digits is 529200, while the sum is 46.

The spelling of 15139257427 in words is "fifteen billion, one hundred thirty-nine million, two hundred fifty-seven thousand, four hundred twenty-seven".