2172145674552 has 64 divisors (see below), whose sum is σ = 6338175851520. Its totient is φ = 607408514688.

The previous prime is 2172145674533. The next prime is 2172145674553. The reversal of 2172145674552 is 2554765412712.

It is a junction number, because it is equal to n+sod(n) for n = 2172145674495 and 2172145674504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172145674553) 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, 137539323 + ... + 137555114.

It is an arithmetic number, because the mean of its divisors is an integer number (99033997680).

Almost surely, 2^{2172145674552} is an apocalyptic number.

It is an amenable number.

2172145674552 is an abundant number, since it is smaller than the sum of its proper divisors (4166030176968).

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

2172145674552 is a wasteful number, since it uses less digits than its factorization.

2172145674552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275094500 (or 275094496 counting only the distinct ones).

The product of its digits is 4704000, while the sum is 51.

The spelling of 2172145674552 in words is "two trillion, one hundred seventy-two billion, one hundred forty-five million, six hundred seventy-four thousand, five hundred fifty-two".