128979532022 has 8 divisors (see below), whose sum is σ = 211057416072. Its totient is φ = 58627060000.

The previous prime is 128979531991. The next prime is 128979532027. The reversal of 128979532022 is 220235979821.

It is a happy number.

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

It is a super-2 number, since 2×128979532022² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128979532027) 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, 2931352979 + ... + 2931353022.

It is an arithmetic number, because the mean of its divisors is an integer number (26382177009).

Almost surely, 2^128979532022 is an apocalyptic number.

128979532022 is a deficient number, since it is larger than the sum of its proper divisors (82077884050).

128979532022 is a wasteful number, since it uses less digits than its factorization.

128979532022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5862706014.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 128979532022 in words is "one hundred twenty-eight billion, nine hundred seventy-nine million, five hundred thirty-two thousand, twenty-two".