129961864092 has 12 divisors (see below), whose sum is σ = 303244349576. Its totient is φ = 43320621360.

The previous prime is 129961864063. The next prime is 129961864099. The reversal of 129961864092 is 290468169921.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×129961864092² (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 (129961864099) 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, 5415077659 + ... + 5415077682.

Almost surely, 2^129961864092 is an apocalyptic number.

129961864092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129961864092 is an abundant number, since it is smaller than the sum of its proper divisors (173282485484).

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

129961864092 is a wasteful number, since it uses less digits than its factorization.

129961864092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10830155348 (or 10830155346 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 57.

The spelling of 129961864092 in words is "one hundred twenty-nine billion, nine hundred sixty-one million, eight hundred sixty-four thousand, ninety-two".