172521960475 has 48 divisors (see below), whose sum is σ = 219593088000. Its totient is φ = 134412410880.

The previous prime is 172521960449. The next prime is 172521960491. The reversal of 172521960475 is 574069125271.

It is a happy number.

It is not a de Polignac number, because 172521960475 - 2¹³ = 172521952283 is a prime.

It is a super-2 number, since 2×172521960475² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75434782 + ... + 75437068.

It is an arithmetic number, because the mean of its divisors is an integer number (4574856000).

Almost surely, 2^172521960475 is an apocalyptic number.

172521960475 is a deficient number, since it is larger than the sum of its proper divisors (47071127525).

172521960475 is a wasteful number, since it uses less digits than its factorization.

172521960475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812 (or 2807 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 172521960475 in words is "one hundred seventy-two billion, five hundred twenty-one million, nine hundred sixty thousand, four hundred seventy-five".