161555703 has 16 divisors (see below), whose sum is σ = 230259456. Its totient is φ = 100506560.

The previous prime is 161555699. The next prime is 161555729. The reversal of 161555703 is 307555161.

161555703 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 161555703 - 2² = 161555699 is a prime.

It is a super-2 number, since 2×161555703² = 52200490343648418, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161555003) 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, 25725 + ... + 31382.

It is an arithmetic number, because the mean of its divisors is an integer number (14391216).

Almost surely, 2^161555703 is an apocalyptic number.

161555703 is a deficient number, since it is larger than the sum of its proper divisors (68703753).

161555703 is a wasteful number, since it uses less digits than its factorization.

161555703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57174.

The product of its (nonzero) digits is 15750, while the sum is 33.

The square root of 161555703 is about 12710.4564434170. The cubic root of 161555703 is about 544.6373627762.

The spelling of 161555703 in words is "one hundred sixty-one million, five hundred fifty-five thousand, seven hundred three".