171625452979 has 2 divisors, whose sum is σ = 171625452980. Its totient is φ = 171625452978.

The previous prime is 171625452967. The next prime is 171625453007. The reversal of 171625452979 is 979254526171.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171625452979 - 2²³ = 171617064371 is a prime.

It is a super-2 number, since 2×171625452979² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (171625452679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85812726489 + 85812726490.

It is an arithmetic number, because the mean of its divisors is an integer number (85812726490).

Almost surely, 2^171625452979 is an apocalyptic number.

171625452979 is a deficient number, since it is larger than the sum of its proper divisors (1).

171625452979 is an equidigital number, since it uses as much as digits as its factorization.

171625452979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9525600, while the sum is 58.

The spelling of 171625452979 in words is "one hundred seventy-one billion, six hundred twenty-five million, four hundred fifty-two thousand, nine hundred seventy-nine".