108145172520 has 512 divisors, whose sum is σ = 464942592000. Its totient is φ = 21696353280.

The previous prime is 108145172519. The next prime is 108145172533. The reversal of 108145172520 is 25271541801.

It is a happy number.

108145172520 is a `hidden beast` number, since 1 + 0 + 8 + 14 + 51 + 72 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2389219 + ... + 2434061.

It is an arithmetic number, because the mean of its divisors is an integer number (908091000).

Almost surely, 2^108145172520 is an apocalyptic number.

108145172520 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 108145172520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232471296000).

108145172520 is an abundant number, since it is smaller than the sum of its proper divisors (356797419480).

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

108145172520 is a wasteful number, since it uses less digits than its factorization.

108145172520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44910 (or 44900 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The spelling of 108145172520 in words is "one hundred eight billion, one hundred forty-five million, one hundred seventy-two thousand, five hundred twenty".