172874127878 has 4 divisors (see below), whose sum is σ = 259311191820. Its totient is φ = 86437063938.

The previous prime is 172874127869. The next prime is 172874127887. The reversal of 172874127878 is 878721478271.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (172874127869) and next prime (172874127887).

It is a self number, because there is not a number n which added to its sum of digits gives 172874127878.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43218531968 + ... + 43218531971.

It is an arithmetic number, because the mean of its divisors is an integer number (64827797955).

Almost surely, 2^172874127878 is an apocalyptic number.

172874127878 is a deficient number, since it is larger than the sum of its proper divisors (86437063942).

172874127878 is an equidigital number, since it uses as much as digits as its factorization.

172874127878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86437063941.

The product of its digits is 19668992, while the sum is 62.

The spelling of 172874127878 in words is "one hundred seventy-two billion, eight hundred seventy-four million, one hundred twenty-seven thousand, eight hundred seventy-eight".