815470428127 has 4 divisors (see below), whose sum is σ = 832820862816. Its totient is φ = 798119993440.

The previous prime is 815470428119. The next prime is 815470428139. The reversal of 815470428127 is 721824074518.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 721824074518 = 2 ⋅360912037259.

It is a cyclic number.

It is not a de Polignac number, because 815470428127 - 2³ = 815470428119 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815470428107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8675217274 + ... + 8675217367.

It is an arithmetic number, because the mean of its divisors is an integer number (208205215704).

Almost surely, 2^815470428127 is an apocalyptic number.

815470428127 is a deficient number, since it is larger than the sum of its proper divisors (17350434689).

815470428127 is a wasteful number, since it uses less digits than its factorization.

815470428127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17350434688.

The product of its (nonzero) digits is 1003520, while the sum is 49.

The spelling of 815470428127 in words is "eight hundred fifteen billion, four hundred seventy million, four hundred twenty-eight thousand, one hundred twenty-seven".