15123011455 has 4 divisors (see below), whose sum is σ = 18147613752. Its totient is φ = 12098409160.

The previous prime is 15123011401. The next prime is 15123011461. The reversal of 15123011455 is 55411032151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55411032151 = 83 ⋅667602797.

It is not a de Polignac number, because 15123011455 - 2⁷ = 15123011327 is a prime.

It is a super-2 number, since 2×15123011455² (a number of 21 digits) contains 22 as substring.

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, 1512301141 + ... + 1512301150.

It is an arithmetic number, because the mean of its divisors is an integer number (4536903438).

Almost surely, 2^15123011455 is an apocalyptic number.

15123011455 is a deficient number, since it is larger than the sum of its proper divisors (3024602297).

15123011455 is an equidigital number, since it uses as much as digits as its factorization.

15123011455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024602296.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 15123011455 in words is "fifteen billion, one hundred twenty-three million, eleven thousand, four hundred fifty-five".