164643663051 has 24 divisors (see below), whose sum is σ = 271859254784. Its totient is φ = 94059059760.

The previous prime is 164643663049. The next prime is 164643663089. The reversal of 164643663051 is 150366346461.

164643663051 is a `hidden beast` number, since 1 + 6 + 4 + 6 + 4 + 3 + 6 + 630 + 5 + 1 = 666.

It is not a de Polignac number, because 164643663051 - 2¹ = 164643663049 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164643662988 and 164643663006.

It is not an unprimeable number, because it can be changed into a prime (164643661051) 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, 58861 + ... + 576846.

Almost surely, 2^164643663051 is an apocalyptic number.

164643663051 is a deficient number, since it is larger than the sum of its proper divisors (107215591733).

164643663051 is a wasteful number, since it uses less digits than its factorization.

164643663051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639831 (or 639828 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The spelling of 164643663051 in words is "one hundred sixty-four billion, six hundred forty-three million, six hundred sixty-three thousand, fifty-one".