164607240681 has 24 divisors (see below), whose sum is σ = 256093830720. Its totient is φ = 101281682016.

The previous prime is 164607240653. The next prime is 164607240683. The reversal of 164607240681 is 186042706461.

164607240681 is a `hidden beast` number, since 1 + 6 + 460 + 72 + 40 + 6 + 81 = 666.

It is not a de Polignac number, because 164607240681 - 2⁵ = 164607240649 is a prime.

It is a super-2 number, since 2×164607240681² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164607240683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 711540 + ... + 914058.

It is an arithmetic number, because the mean of its divisors is an integer number (10670576280).

Almost surely, 2^164607240681 is an apocalyptic number.

It is an amenable number.

164607240681 is a deficient number, since it is larger than the sum of its proper divisors (91486590039).

164607240681 is a wasteful number, since it uses less digits than its factorization.

164607240681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209485 (or 209482 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 164607240681 in words is "one hundred sixty-four billion, six hundred seven million, two hundred forty thousand, six hundred eighty-one".