164253645 has 12 divisors (see below), whose sum is σ = 284706396. Its totient is φ = 87601920.

The previous prime is 164253641. The next prime is 164253671. The reversal of 164253645 is 546352461.

164253645 is a `hidden beast` number, since 1 + 6 + 4 + 2 + 5 + 3 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19027044 + 145226601 = 4362^2 + 12051^2 .

It is not a de Polignac number, because 164253645 - 2² = 164253641 is a prime.

It is a super-3 number, since 3×164253645³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164253641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1824996 + ... + 1825085.

It is an arithmetic number, because the mean of its divisors is an integer number (23725533).

Almost surely, 2^164253645 is an apocalyptic number.

164253645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164253645 is a deficient number, since it is larger than the sum of its proper divisors (120452751).

164253645 is a wasteful number, since it uses less digits than its factorization.

164253645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650092 (or 3650089 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 164253645 is about 12816.1478221812. The cubic root of 164253645 is about 547.6524126873.

The spelling of 164253645 in words is "one hundred sixty-four million, two hundred fifty-three thousand, six hundred forty-five".