2172514866345 has 48 divisors (see below), whose sum is σ = 3804904696320. Its totient is φ = 1146662569728.

The previous prime is 2172514866337. The next prime is 2172514866391. The reversal of 2172514866345 is 5436684152712.

2172514866345 is a `hidden beast` number, since 2 + 1 + 7 + 2 + 514 + 86 + 6 + 3 + 45 = 666.

It is not a de Polignac number, because 2172514866345 - 2³ = 2172514866337 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2172514866291 and 2172514866300.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1402984 + ... + 2512646.

It is an arithmetic number, because the mean of its divisors is an integer number (79268847840).

Almost surely, 2^{2172514866345} is an apocalyptic number.

It is an amenable number.

2172514866345 is a deficient number, since it is larger than the sum of its proper divisors (1632389829975).

2172514866345 is a wasteful number, since it uses less digits than its factorization.

2172514866345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110126 (or 1110123 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 2172514866345 in words is "two trillion, one hundred seventy-two billion, five hundred fourteen million, eight hundred sixty-six thousand, three hundred forty-five".