129166375377 has 32 divisors (see below), whose sum is σ = 206715438720. Its totient is φ = 70873850880.

The previous prime is 129166375363. The next prime is 129166375379. The reversal of 129166375377 is 773573661921.

It is not a de Polignac number, because 129166375377 - 2¹⁵ = 129166342609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (129166375379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5114274 + ... + 5139467.

It is an arithmetic number, because the mean of its divisors is an integer number (6459857460).

Almost surely, 2^129166375377 is an apocalyptic number.

129166375377 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

129166375377 is a deficient number, since it is larger than the sum of its proper divisors (77549063343).

129166375377 is a wasteful number, since it uses less digits than its factorization.

129166375377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10253793.

The product of its digits is 10001880, while the sum is 57.

The spelling of 129166375377 in words is "one hundred twenty-nine billion, one hundred sixty-six million, three hundred seventy-five thousand, three hundred seventy-seven".