172136977667 has 2 divisors, whose sum is σ = 172136977668. Its totient is φ = 172136977666.

The previous prime is 172136977633. The next prime is 172136977703. The reversal of 172136977667 is 766779631271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172136977667 - 2²⁸ = 171868542211 is a prime.

It is a super-2 number, since 2×172136977667² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (172136977567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86068488833 + 86068488834.

It is an arithmetic number, because the mean of its divisors is an integer number (86068488834).

Almost surely, 2^172136977667 is an apocalyptic number.

172136977667 is a deficient number, since it is larger than the sum of its proper divisors (1).

172136977667 is an equidigital number, since it uses as much as digits as its factorization.

172136977667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28005264, while the sum is 62.

The spelling of 172136977667 in words is "one hundred seventy-two billion, one hundred thirty-six million, nine hundred seventy-seven thousand, six hundred sixty-seven".