167997792257 has 4 divisors (see below), whose sum is σ = 168293043780. Its totient is φ = 167702540736.

The previous prime is 167997792239. The next prime is 167997792271. The reversal of 167997792257 is 752297799761.

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 46085784976 + 121912007281 = 214676^2 + 349159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167997792257 is a prime.

It is a super-2 number, since 2×167997792257² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (167997782257) 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, 147624908 + ... + 147626045.

It is an arithmetic number, because the mean of its divisors is an integer number (42073260945).

Almost surely, 2^167997792257 is an apocalyptic number.

It is an amenable number.

167997792257 is a deficient number, since it is larger than the sum of its proper divisors (295251523).

167997792257 is an equidigital number, since it uses as much as digits as its factorization.

167997792257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295251522.

The product of its digits is 210039480, while the sum is 71.

The spelling of 167997792257 in words is "one hundred sixty-seven billion, nine hundred ninety-seven million, seven hundred ninety-two thousand, two hundred fifty-seven".