167497840225 has 9 divisors (see below), whose sum is σ = 207699859353. Its totient is φ = 133996635120.

The previous prime is 167497840217. The next prime is 167497840229. The reversal of 167497840225 is 522048794761.

The square root of 167497840225 is 409265.

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

It can be written as a sum of positive squares in 4 ways, for example, as 19568372769 + 147929467456 = 139887^2 + 384616^2 .

It is not a de Polignac number, because 167497840225 - 2³ = 167497840217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (167497840229) 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, 2005399 + ... + 2087251.

Almost surely, 2^167497840225 is an apocalyptic number.

167497840225 is the 409265-th square number.

167497840225 is the 204633-rd centered octagonal number.

It is an amenable number.

167497840225 is a deficient number, since it is larger than the sum of its proper divisors (40202019128).

167497840225 is an frugal number, since it uses more digits than its factorization.

167497840225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163716 (or 81858 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 167497840225 in words is "one hundred sixty-seven billion, four hundred ninety-seven million, eight hundred forty thousand, two hundred twenty-five".