15261242455 has 4 divisors (see below), whose sum is σ = 18313490952. Its totient is φ = 12208993960.

The previous prime is 15261242441. The next prime is 15261242471. The reversal of 15261242455 is 55424216251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55424216251 = 137 ⋅404556323.

It is not a de Polignac number, because 15261242455 - 2⁷ = 15261242327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1526124241 + ... + 1526124250.

It is an arithmetic number, because the mean of its divisors is an integer number (4578372738).

Almost surely, 2^15261242455 is an apocalyptic number.

15261242455 is a deficient number, since it is larger than the sum of its proper divisors (3052248497).

15261242455 is an equidigital number, since it uses as much as digits as its factorization.

15261242455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3052248496.

The product of its digits is 96000, while the sum is 37.

The spelling of 15261242455 in words is "fifteen billion, two hundred sixty-one million, two hundred forty-two thousand, four hundred fifty-five".