172575121512461 has 4 divisors (see below), whose sum is σ = 172620909555900. Its totient is φ = 172529333469024.

The previous prime is 172575121512457. The next prime is 172575121512539. The reversal of 172575121512461 is 164215121575271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 162931183802500 + 9643937709961 = 12764450^2 + 3105469^2 .

It is a cyclic number.

It is not a de Polignac number, because 172575121512461 - 2² = 172575121512457 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172575121512061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22894016066 + ... + 22894023603.

It is an arithmetic number, because the mean of its divisors is an integer number (43155227388975).

Almost surely, 2^{172575121512461} is an apocalyptic number.

It is an amenable number.

172575121512461 is a deficient number, since it is larger than the sum of its proper divisors (45788043439).

172575121512461 is an equidigital number, since it uses as much as digits as its factorization.

172575121512461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45788043438.

The product of its digits is 1176000, while the sum is 50.

The spelling of 172575121512461 in words is "one hundred seventy-two trillion, five hundred seventy-five billion, one hundred twenty-one million, five hundred twelve thousand, four hundred sixty-one".