2178523959164 has 36 divisors (see below), whose sum is σ = 4440821487984. Its totient is φ = 932396463936.

The previous prime is 2178523959137. The next prime is 2178523959167. The reversal of 2178523959164 is 4619593258712.

It is a junction number, because it is equal to n+sod(n) for n = 2178523959097 and 2178523959106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178523959167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7334129 + ... + 7625384.

It is an arithmetic number, because the mean of its divisors is an integer number (123356152444).

Almost surely, 2^{2178523959164} is an apocalyptic number.

It is an amenable number.

2178523959164 is an abundant number, since it is smaller than the sum of its proper divisors (2262297528820).

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

2178523959164 is a wasteful number, since it uses less digits than its factorization.

2178523959164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14960274 (or 14960265 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 62.

The spelling of 2178523959164 in words is "two trillion, one hundred seventy-eight billion, five hundred twenty-three million, nine hundred fifty-nine thousand, one hundred sixty-four".