164457657 has 48 divisors (see below), whose sum is σ = 294461440. Its totient is φ = 86126976.

The previous prime is 164457649. The next prime is 164457661. The reversal of 164457657 is 756754461.

It is not a de Polignac number, because 164457657 - 2³ = 164457649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164457607) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 127944 + ... + 129222.

Almost surely, 2^164457657 is an apocalyptic number.

It is an amenable number.

164457657 is a deficient number, since it is larger than the sum of its proper divisors (130003783).

164457657 is a wasteful number, since it uses less digits than its factorization.

164457657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462 (or 1459 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 164457657 is about 12824.1045301417. The cubic root of 164457657 is about 547.8790569496.

The spelling of 164457657 in words is "one hundred sixty-four million, four hundred fifty-seven thousand, six hundred fifty-seven".