129146016776 has 32 divisors (see below), whose sum is σ = 281278217280. Its totient is φ = 54440942400.

The previous prime is 129146016757. The next prime is 129146016799. The reversal of 129146016776 is 677610641921.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18899690 + ... + 18906521.

It is an arithmetic number, because the mean of its divisors is an integer number (8789944290).

Almost surely, 2^129146016776 is an apocalyptic number.

It is an amenable number.

129146016776 is an abundant number, since it is smaller than the sum of its proper divisors (152132200504).

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

129146016776 is a wasteful number, since it uses less digits than its factorization.

129146016776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37806285 (or 37806281 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 129146016776 in words is "one hundred twenty-nine billion, one hundred forty-six million, sixteen thousand, seven hundred seventy-six".