167217240557 has 4 divisors (see below), whose sum is σ = 168697039260. Its totient is φ = 165737441856.

The previous prime is 167217240551. The next prime is 167217240571. The reversal of 167217240557 is 755042712761.

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 73516357321 + 93700883236 = 271139^2 + 306106^2 .

It is a cyclic number.

It is not a de Polignac number, because 167217240557 - 2²⁰ = 167216191981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167217240551) 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, 739899182 + ... + 739899407.

It is an arithmetic number, because the mean of its divisors is an integer number (42174259815).

Almost surely, 2^167217240557 is an apocalyptic number.

It is an amenable number.

167217240557 is a deficient number, since it is larger than the sum of its proper divisors (1479798703).

167217240557 is a wasteful number, since it uses less digits than its factorization.

167217240557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479798702.

The product of its (nonzero) digits is 823200, while the sum is 47.

The spelling of 167217240557 in words is "one hundred sixty-seven billion, two hundred seventeen million, two hundred forty thousand, five hundred fifty-seven".