161555704 has 16 divisors (see below), whose sum is σ = 304670520. Its totient is φ = 80310240.

The previous prime is 161555699. The next prime is 161555729. The reversal of 161555704 is 407555161.

It is a super-2 number, since 2×161555704² = 52200490989871232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161555704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56982 + ... + 59749.

Almost surely, 2^161555704 is an apocalyptic number.

It is an amenable number.

161555704 is a deficient number, since it is larger than the sum of its proper divisors (143114816).

161555704 is a wasteful number, since it uses less digits than its factorization.

161555704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116910 (or 116906 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 161555704 is about 12710.4564827547. The cubic root of 161555704 is about 544.6373638999.

The spelling of 161555704 in words is "one hundred sixty-one million, five hundred fifty-five thousand, seven hundred four".