161051657 has 16 divisors (see below), whose sum is σ = 186466560. Its totient is φ = 137832192.

The previous prime is 161051629. The next prime is 161051669. The reversal of 161051657 is 756150161.

It is a cyclic number.

It is not a de Polignac number, because 161051657 - 2⁶ = 161051593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161051677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4673 + ... + 18545.

It is an arithmetic number, because the mean of its divisors is an integer number (11654160).

Almost surely, 2^161051657 is an apocalyptic number.

It is an amenable number.

161051657 is a deficient number, since it is larger than the sum of its proper divisors (25414903).

161051657 is a wasteful number, since it uses less digits than its factorization.

161051657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13952.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 161051657 is about 12690.6129481598. The cubic root of 161051657 is about 544.0703585918.

The spelling of 161051657 in words is "one hundred sixty-one million, fifty-one thousand, six hundred fifty-seven".