12177517870 has 32 divisors (see below), whose sum is σ = 25633479168. Its totient is φ = 4078051488.

The previous prime is 12177517817. The next prime is 12177517903. The reversal of 12177517870 is 7871577121.

It is a self number, because there is not a number n which added to its sum of digits gives 12177517870.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2019834 + ... + 2025853.

It is an arithmetic number, because the mean of its divisors is an integer number (801046224).

Almost surely, 2^12177517870 is an apocalyptic number.

12177517870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12177517870 is an abundant number, since it is smaller than the sum of its proper divisors (13455961298).

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

12177517870 is a wasteful number, since it uses less digits than its factorization.

12177517870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4045744.

The product of its (nonzero) digits is 192080, while the sum is 46.

The spelling of 12177517870 in words is "twelve billion, one hundred seventy-seven million, five hundred seventeen thousand, eight hundred seventy".