172207543840 has 96 divisors (see below), whose sum is σ = 431003870640. Its totient is φ = 64796196864.

The previous prime is 172207543819. The next prime is 172207543853. The reversal of 172207543840 is 48345702271.

It can be written as a sum of positive squares in 8 ways, for example, as 22429255696 + 149778288144 = 149764^2 + 387012^2 .

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, 5350516 + ... + 5382604.

Almost surely, 2^172207543840 is an apocalyptic number.

172207543840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172207543840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215501935320).

172207543840 is an abundant number, since it is smaller than the sum of its proper divisors (258796326800).

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

172207543840 is a wasteful number, since it uses less digits than its factorization.

172207543840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34094 (or 34086 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 43.

The spelling of 172207543840 in words is "one hundred seventy-two billion, two hundred seven million, five hundred forty-three thousand, eight hundred forty".