2173315656477 has 16 divisors (see below), whose sum is σ = 3357085112960. Its totient is φ = 1224882404352.

The previous prime is 2173315656461. The next prime is 2173315656487. The reversal of 2173315656477 is 7746565133712.

It is not a de Polignac number, because 2173315656477 - 2⁴ = 2173315656461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173315656487) 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, 708842452 + ... + 708845517.

It is an arithmetic number, because the mean of its divisors is an integer number (209817819560).

Almost surely, 2^{2173315656477} is an apocalyptic number.

It is an amenable number.

2173315656477 is a deficient number, since it is larger than the sum of its proper divisors (1183769456483).

2173315656477 is a wasteful number, since it uses less digits than its factorization.

2173315656477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417688052.

The product of its digits is 22226400, while the sum is 57.

The spelling of 2173315656477 in words is "two trillion, one hundred seventy-three billion, three hundred fifteen million, six hundred fifty-six thousand, four hundred seventy-seven".