2172642954920 has 64 divisors (see below), whose sum is σ = 5189879621520. Its totient is φ = 815743217664.

The previous prime is 2172642954901. The next prime is 2172642954943. The reversal of 2172642954920 is 294592462712.

It can be written as a sum of positive squares in 8 ways, for example, as 1122112252804 + 1050530702116 = 1059298^2 + 1024954^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4029287 + ... + 4536566.

Almost surely, 2^{2172642954920} is an apocalyptic number.

2172642954920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2172642954920 is an abundant number, since it is smaller than the sum of its proper divisors (3017236666600).

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

2172642954920 is a wasteful number, since it uses less digits than its factorization.

2172642954920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8566254 (or 8566250 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 2172642954920 in words is "two trillion, one hundred seventy-two billion, six hundred forty-two million, nine hundred fifty-four thousand, nine hundred twenty".