172713383778 has 32 divisors (see below), whose sum is σ = 372079060416. Its totient is φ = 53131007808.

The previous prime is 172713383771. The next prime is 172713383819. The reversal of 172713383778 is 877383317271.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (172713383771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122925 + ... + 600447.

It is an arithmetic number, because the mean of its divisors is an integer number (11627470638).

Almost surely, 2^172713383778 is an apocalyptic number.

172713383778 is an abundant number, since it is smaller than the sum of its proper divisors (199365676638).

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

172713383778 is a wasteful number, since it uses less digits than its factorization.

172713383778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482178.

The product of its digits is 8297856, while the sum is 57.

The spelling of 172713383778 in words is "one hundred seventy-two billion, seven hundred thirteen million, three hundred eighty-three thousand, seven hundred seventy-eight".