172261267295851 has 4 divisors (see below), whose sum is σ = 172261310574712. Its totient is φ = 172261224016992.

The previous prime is 172261267295791. The next prime is 172261267295857. The reversal of 172261267295851 is 158592762162271.

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

It is a cyclic number.

It is not a de Polignac number, because 172261267295851 - 2⁷ = 172261267295723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172261267295857) 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, 14987421 + ... + 23856766.

It is an arithmetic number, because the mean of its divisors is an integer number (43065327643678).

Almost surely, 2^{172261267295851} is an apocalyptic number.

172261267295851 is a deficient number, since it is larger than the sum of its proper divisors (43278861).

172261267295851 is an equidigital number, since it uses as much as digits as its factorization.

172261267295851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43278860.

The product of its digits is 50803200, while the sum is 64.

The spelling of 172261267295851 in words is "one hundred seventy-two trillion, two hundred sixty-one billion, two hundred sixty-seven million, two hundred ninety-five thousand, eight hundred fifty-one".