161445656 has 8 divisors (see below), whose sum is σ = 302710620. Its totient is φ = 80722824.

The previous prime is 161445643. The next prime is 161445667. The reversal of 161445656 is 656544161.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10090346 + ... + 10090361.

Almost surely, 2^161445656 is an apocalyptic number.

It is an amenable number.

161445656 is a deficient number, since it is larger than the sum of its proper divisors (141264964).

161445656 is a wasteful number, since it uses less digits than its factorization.

161445656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20180713 (or 20180709 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 161445656 is about 12706.1267111579. The cubic root of 161445656 is about 544.5136710283.

The spelling of 161445656 in words is "one hundred sixty-one million, four hundred forty-five thousand, six hundred fifty-six".