172152115120 has 80 divisors (see below), whose sum is σ = 409660530048. Its totient is φ = 67248849920.

The previous prime is 172152115039. The next prime is 172152115129. The reversal of 172152115120 is 21511251271.

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

It is a super-2 number, since 2×172152115120² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172152115129) 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, 1683702 + ... + 1783018.

Almost surely, 2^172152115120 is an apocalyptic number.

172152115120 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 172152115120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204830265024).

172152115120 is an abundant number, since it is smaller than the sum of its proper divisors (237508414928).

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

172152115120 is a wasteful number, since it uses less digits than its factorization.

172152115120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99838 (or 99832 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 28.

Adding to 172152115120 its reverse (21511251271), we get a palindrome (193663366391).

The spelling of 172152115120 in words is "one hundred seventy-two billion, one hundred fifty-two million, one hundred fifteen thousand, one hundred twenty".