129477734848 has 168 divisors, whose sum is σ = 345232542960. Its totient is φ = 47478251520.

The previous prime is 129477734839. The next prime is 129477734863. The reversal of 129477734848 is 848437774921.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a self number, because there is not a number n which added to its sum of digits gives 129477734848.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 476038 + ... + 696826.

Almost surely, 2^129477734848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129477734848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172616271480).

129477734848 is an abundant number, since it is smaller than the sum of its proper divisors (215754808112).

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

129477734848 is a wasteful number, since it uses less digits than its factorization.

129477734848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220843 (or 220826 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 64.

The spelling of 129477734848 in words is "one hundred twenty-nine billion, four hundred seventy-seven million, seven hundred thirty-four thousand, eight hundred forty-eight".