127815399133 has 4 divisors (see below), whose sum is σ = 127923079680. Its totient is φ = 127707718588.

The previous prime is 127815399097. The next prime is 127815399137. The reversal of 127815399133 is 331993518721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331993518721 = 17 ⋅19529030513.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127815399133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127815399137) 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, 53838493 + ... + 53840866.

It is an arithmetic number, because the mean of its divisors is an integer number (31980769920).

Almost surely, 2^127815399133 is an apocalyptic number.

It is an amenable number.

127815399133 is a deficient number, since it is larger than the sum of its proper divisors (107680547).

127815399133 is a wasteful number, since it uses less digits than its factorization.

127815399133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107680546.

The product of its digits is 1224720, while the sum is 52.

The spelling of 127815399133 in words is "one hundred twenty-seven billion, eight hundred fifteen million, three hundred ninety-nine thousand, one hundred thirty-three".