161457004 has 6 divisors (see below), whose sum is σ = 282549764. Its totient is φ = 80728500.

The previous prime is 161457001. The next prime is 161457029. The reversal of 161457004 is 400754161.

It is not an unprimeable number, because it can be changed into a prime (161457001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20182122 + ... + 20182129.

Almost surely, 2^161457004 is an apocalyptic number.

It is an amenable number.

161457004 is a deficient number, since it is larger than the sum of its proper divisors (121092760).

161457004 is a wasteful number, since it uses less digits than its factorization.

161457004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40364255 (or 40364253 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 161457004 is about 12706.5732595378. The cubic root of 161457004 is about 544.5264286677.

The spelling of 161457004 in words is "one hundred sixty-one million, four hundred fifty-seven thousand, four".