172374555440 has 80 divisors (see below), whose sum is σ = 411983827776. Its totient is φ = 67047321600.

The previous prime is 172374555433. The next prime is 172374555443. The reversal of 172374555440 is 44555473271.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (172374555443) 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, 206780 + ... + 622500.

Almost surely, 2^172374555440 is an apocalyptic number.

172374555440 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 172374555440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205991913888).

172374555440 is an abundant number, since it is smaller than the sum of its proper divisors (239609272336).

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

172374555440 is a wasteful number, since it uses less digits than its factorization.

172374555440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415878 (or 415872 counting only the distinct ones).

The product of its (nonzero) digits is 2352000, while the sum is 47.

The spelling of 172374555440 in words is "one hundred seventy-two billion, three hundred seventy-four million, five hundred fifty-five thousand, four hundred forty".