129647774032 has 40 divisors (see below), whose sum is σ = 287482294400. Its totient is φ = 55484929152.

The previous prime is 129647774017. The next prime is 129647774051. The reversal of 129647774032 is 230477746921.

It is a super-2 number, since 2×129647774032² (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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 736932 + ... + 895747.

It is an arithmetic number, because the mean of its divisors is an integer number (7187057360).

Almost surely, 2^129647774032 is an apocalyptic number.

It is an amenable number.

129647774032 is an abundant number, since it is smaller than the sum of its proper divisors (157834520368).

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

129647774032 is a wasteful number, since it uses less digits than its factorization.

129647774032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633403 (or 1633397 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 52.

The spelling of 129647774032 in words is "one hundred twenty-nine billion, six hundred forty-seven million, seven hundred seventy-four thousand, thirty-two".