172166050157 has 2 divisors, whose sum is σ = 172166050158. Its totient is φ = 172166050156.

The previous prime is 172166050153. The next prime is 172166050187. The reversal of 172166050157 is 751050661271.

172166050157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163550683396 + 8615366761 = 404414^2 + 92819^2 .

It is a cyclic number.

It is not a de Polignac number, because 172166050157 - 2² = 172166050153 is a prime.

It is a super-2 number, since 2×172166050157² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172166050151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86083025078 + 86083025079.

It is an arithmetic number, because the mean of its divisors is an integer number (86083025079).

Almost surely, 2^172166050157 is an apocalyptic number.

It is an amenable number.

172166050157 is a deficient number, since it is larger than the sum of its proper divisors (1).

172166050157 is an equidigital number, since it uses as much as digits as its factorization.

172166050157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 172166050157 in words is "one hundred seventy-two billion, one hundred sixty-six million, fifty thousand, one hundred fifty-seven".