167155869409 has 9 divisors (see below), whose sum is σ = 168776844691. Its totient is φ = 165550327240.

The previous prime is 167155869367. The next prime is 167155869449. The reversal of 167155869409 is 904968551761.

The square root of 167155869409 is 408847.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 150115177809 + 17040691600 = 387447^2 + 130540^2 .

It is not a de Polignac number, because 167155869409 - 2²¹ = 167153772257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (167155869449) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 43744719 + ... + 43748539.

Almost surely, 2^167155869409 is an apocalyptic number.

167155869409 is the 408847-th square number.

167155869409 is the 204424-th centered octagonal number.

It is an amenable number.

167155869409 is a deficient number, since it is larger than the sum of its proper divisors (1620975282).

167155869409 is an frugal number, since it uses more digits than its factorization.

167155869409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7856 (or 3928 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 61.

The spelling of 167155869409 in words is "one hundred sixty-seven billion, one hundred fifty-five million, eight hundred sixty-nine thousand, four hundred nine".