172672812500 has 48 divisors (see below), whose sum is σ = 377721493968. Its totient is φ = 69069000000.

The previous prime is 172672812491. The next prime is 172672812503. The reversal of 172672812500 is 5218276271.

It can be written as a sum of positive squares in 8 ways, for example, as 116831341636 + 55841470864 = 341806^2 + 236308^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172672812503) 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, 36224 + ... + 588776.

It is an arithmetic number, because the mean of its divisors is an integer number (7869197791).

Almost surely, 2^172672812500 is an apocalyptic number.

172672812500 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 172672812500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188860746984).

172672812500 is an abundant number, since it is smaller than the sum of its proper divisors (205048681468).

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

172672812500 is an frugal number, since it uses more digits than its factorization.

172672812500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552592 (or 552560 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 41.

The spelling of 172672812500 in words is "one hundred seventy-two billion, six hundred seventy-two million, eight hundred twelve thousand, five hundred".