128762626389 has 8 divisors (see below), whose sum is σ = 173383338912. Its totient is φ = 84991832400.

The previous prime is 128762626367. The next prime is 128762626393. The reversal of 128762626389 is 983626267821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128762626389 - 2⁹ = 128762625877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128762626339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212479279 + ... + 212479884.

It is an arithmetic number, because the mean of its divisors is an integer number (21672917364).

Almost surely, 2^128762626389 is an apocalyptic number.

It is an amenable number.

128762626389 is a deficient number, since it is larger than the sum of its proper divisors (44620712523).

128762626389 is a wasteful number, since it uses less digits than its factorization.

128762626389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424959267.

The product of its digits is 20901888, while the sum is 60.

The spelling of 128762626389 in words is "one hundred twenty-eight billion, seven hundred sixty-two million, six hundred twenty-six thousand, three hundred eighty-nine".