129167886020 has 12 divisors (see below), whose sum is σ = 271252560684. Its totient is φ = 51667154400.

The previous prime is 129167886019. The next prime is 129167886037. The reversal of 129167886020 is 20688761921.

It can be written as a sum of positive squares in 2 ways, for example, as 79470992836 + 49696893184 = 281906^2 + 222928^2 .

It is a super-2 number, since 2×129167886020² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 129167886020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3229197131 + ... + 3229197170.

It is an arithmetic number, because the mean of its divisors is an integer number (22604380057).

Almost surely, 2^129167886020 is an apocalyptic number.

129167886020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129167886020 is an abundant number, since it is smaller than the sum of its proper divisors (142084674664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129167886020 is a wasteful number, since it uses less digits than its factorization.

129167886020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6458394310 (or 6458394308 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 129167886020 in words is "one hundred twenty-nine billion, one hundred sixty-seven million, eight hundred eighty-six thousand, twenty".