1657450161 has 32 divisors (see below), whose sum is σ = 2588352000. Its totient is φ = 1045339344.

The previous prime is 1657450153. The next prime is 1657450163. The reversal of 1657450161 is 1610547561.

It is a happy number.

It is not a de Polignac number, because 1657450161 - 2³ = 1657450153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1657450163) 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, 451150 + ... + 454808.

It is an arithmetic number, because the mean of its divisors is an integer number (80886000).

Almost surely, 2^1657450161 is an apocalyptic number.

It is an amenable number.

1657450161 is a deficient number, since it is larger than the sum of its proper divisors (930901839).

1657450161 is a wasteful number, since it uses less digits than its factorization.

1657450161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4570 (or 4564 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 1657450161 is about 40711.7938808891. The cubic root of 1657450161 is about 1183.4415854327.

The spelling of 1657450161 in words is "one billion, six hundred fifty-seven million, four hundred fifty thousand, one hundred sixty-one".