129875397020 has 24 divisors (see below), whose sum is σ = 275438717568. Its totient is φ = 51435800000.

The previous prime is 129875397013. The next prime is 129875397083. The reversal of 129875397020 is 20793578921.

It is a happy number.

It is a super-2 number, since 2×129875397020² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32145356 + ... + 32149395.

It is an arithmetic number, because the mean of its divisors is an integer number (11476613232).

Almost surely, 2^129875397020 is an apocalyptic number.

129875397020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129875397020 is an abundant number, since it is smaller than the sum of its proper divisors (145563320548).

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

129875397020 is a wasteful number, since it uses less digits than its factorization.

129875397020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64294861 (or 64294859 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 129875397020 in words is "one hundred twenty-nine billion, eight hundred seventy-five million, three hundred ninety-seven thousand, twenty".