129377199894 has 12 divisors (see below), whose sum is σ = 258756161916. Its totient is φ = 43125439612.

The previous prime is 129377199859. The next prime is 129377199937. The reversal of 129377199894 is 498991773921.

It is a super-2 number, since 2×129377199894² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 807637 + ... + 954479.

It is an arithmetic number, because the mean of its divisors is an integer number (21563013493).

Almost surely, 2^129377199894 is an apocalyptic number.

129377199894 is an abundant number, since it is smaller than the sum of its proper divisors (129378962022).

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

129377199894 is an frugal number, since it uses more digits than its factorization.

129377199894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293691 (or 146848 counting only the distinct ones).

The product of its digits is 61725888, while the sum is 69.

The spelling of 129377199894 in words is "one hundred twenty-nine billion, three hundred seventy-seven million, one hundred ninety-nine thousand, eight hundred ninety-four".