129426161945832 has 48 divisors (see below), whose sum is σ = 352881733522500. Its totient is φ = 42852509991936.

The previous prime is 129426161945827. The next prime is 129426161945887. The reversal of 129426161945832 is 238549161624921.

It is a happy number.

129426161945832 is a `hidden beast` number, since 1 + 2 + 9 + 4 + 2 + 6 + 1 + 619 + 4 + 5 + 8 + 3 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 129373654056516 + 52507889316 = 11374254^2 + 229146^2 .

It is a super-2 number, since 2×129426161945832² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129426161945832.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6032155657 + ... + 6032177112.

Almost surely, 2^{129426161945832} is an apocalyptic number.

129426161945832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129426161945832 is an abundant number, since it is smaller than the sum of its proper divisors (223455571576668).

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

129426161945832 is a wasteful number, since it uses less digits than its factorization.

129426161945832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12064332930 (or 12064332923 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 63.

The spelling of 129426161945832 in words is "one hundred twenty-nine trillion, four hundred twenty-six billion, one hundred sixty-one million, nine hundred forty-five thousand, eight hundred thirty-two".