172355047480 has 384 divisors, whose sum is σ = 498570992640. Its totient is φ = 52477286400.

The previous prime is 172355047477. The next prime is 172355047489. The reversal of 172355047480 is 84740553271.

It is a self number, because there is not a number n which added to its sum of digits gives 172355047480.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172355047489) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 329550499 + ... + 329551021.

It is an arithmetic number, because the mean of its divisors is an integer number (1298361960).

Almost surely, 2^172355047480 is an apocalyptic number.

172355047480 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 172355047480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249285496320).

172355047480 is an abundant number, since it is smaller than the sum of its proper divisors (326215945160).

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

172355047480 is a wasteful number, since it uses less digits than its factorization.

172355047480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 46.

The spelling of 172355047480 in words is "one hundred seventy-two billion, three hundred fifty-five million, forty-seven thousand, four hundred eighty".