128974299873 has 16 divisors (see below), whose sum is σ = 172209265920. Its totient is φ = 85861183616.

The previous prime is 128974299851. The next prime is 128974299901. The reversal of 128974299873 is 378992479821.

It is a cyclic number.

It is not a de Polignac number, because 128974299873 - 2²² = 128970105569 is a prime.

It is a super-2 number, since 2×128974299873² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128974299798 and 128974299807.

It is not an unprimeable number, because it can be changed into a prime (128974299973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7353208 + ... + 7370726.

It is an arithmetic number, because the mean of its divisors is an integer number (10763079120).

Almost surely, 2^128974299873 is an apocalyptic number.

It is an amenable number.

128974299873 is a deficient number, since it is larger than the sum of its proper divisors (43234966047).

128974299873 is a wasteful number, since it uses less digits than its factorization.

128974299873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20856.

The product of its digits is 109734912, while the sum is 69.

The spelling of 128974299873 in words is "one hundred twenty-eight billion, nine hundred seventy-four million, two hundred ninety-nine thousand, eight hundred seventy-three".