268572172500 has 480 divisors, whose sum is σ = 931174428800. Its totient is φ = 66718080000.

The previous prime is 268572172499. The next prime is 268572172507. The reversal of 268572172500 is 5271275862.

268572172500 is a `hidden beast` number, since 2 + 6 + 8 + 5 + 72 + 1 + 72 + 500 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268572172507) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 78230784 + ... + 78234216.

Almost surely, 2^268572172500 is an apocalyptic number.

268572172500 is a gapful number since it is divisible by the number (20) 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 268572172500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (465587214400).

268572172500 is an abundant number, since it is smaller than the sum of its proper divisors (662602256300).

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

268572172500 is a wasteful number, since it uses less digits than its factorization.

268572172500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546 (or 3523 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 268572172500 in words is "two hundred sixty-eight billion, five hundred seventy-two million, one hundred seventy-two thousand, five hundred".