167271320565 has 32 divisors (see below), whose sum is σ = 314863666560. Its totient is φ = 83963642112.

The previous prime is 167271320563. The next prime is 167271320621. The reversal of 167271320565 is 565023172761.

It is a happy number.

167271320565 is a `hidden beast` number, since 1 + 6 + 7 + 271 + 320 + 56 + 5 = 666.

It is not a de Polignac number, because 167271320565 - 2¹ = 167271320563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 167271320565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167271320563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36440259 + ... + 36444848.

It is an arithmetic number, because the mean of its divisors is an integer number (9839489580).

Almost surely, 2^167271320565 is an apocalyptic number.

167271320565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

167271320565 is a deficient number, since it is larger than the sum of its proper divisors (147592345995).

167271320565 is a wasteful number, since it uses less digits than its factorization.

167271320565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72885138 (or 72885132 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The spelling of 167271320565 in words is "one hundred sixty-seven billion, two hundred seventy-one million, three hundred twenty thousand, five hundred sixty-five".