172400762879 has 16 divisors (see below), whose sum is σ = 174216946176. Its totient is φ = 170597340000.

The previous prime is 172400762869. The next prime is 172400762893. The reversal of 172400762879 is 978267004271.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172400762879 is a prime.

It is a super-2 number, since 2×172400762879² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172400762879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172400762819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24741854 + ... + 24748820.

It is an arithmetic number, because the mean of its divisors is an integer number (10888559136).

Almost surely, 2^172400762879 is an apocalyptic number.

172400762879 is a deficient number, since it is larger than the sum of its proper divisors (1816183297).

172400762879 is a wasteful number, since it uses less digits than its factorization.

172400762879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7846.

The product of its (nonzero) digits is 2370816, while the sum is 53.

The spelling of 172400762879 in words is "one hundred seventy-two billion, four hundred million, seven hundred sixty-two thousand, eight hundred seventy-nine".