268572172501 has 4 divisors (see below), whose sum is σ = 268645217292. Its totient is φ = 268499127712.

The previous prime is 268572172499. The next prime is 268572172507. The reversal of 268572172501 is 105271275862.

It is a happy number.

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 92970108100 + 175602064401 = 304910^2 + 419049^2 .

It is a cyclic number.

It is not a de Polignac number, because 268572172501 - 2¹ = 268572172499 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 (268572172507) 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, 36516880 + ... + 36524233.

It is an arithmetic number, because the mean of its divisors is an integer number (67161304323).

Almost surely, 2^268572172501 is an apocalyptic number.

It is an amenable number.

268572172501 is a deficient number, since it is larger than the sum of its proper divisors (73044791).

268572172501 is an equidigital number, since it uses as much as digits as its factorization.

268572172501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73044790.

The product of its (nonzero) digits is 470400, while the sum is 46.

The spelling of 268572172501 in words is "two hundred sixty-eight billion, five hundred seventy-two million, one hundred seventy-two thousand, five hundred one".