161555602 has 16 divisors (see below), whose sum is σ = 261700992. Its totient is φ = 74356560.

The previous prime is 161555587. The next prime is 161555623. The reversal of 161555602 is 206555161.

It is a super-2 number, since 2×161555602² = 52200425075164808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1077 + ... + 18007.

It is an arithmetic number, because the mean of its divisors is an integer number (16356312).

Almost surely, 2^161555602 is an apocalyptic number.

161555602 is a deficient number, since it is larger than the sum of its proper divisors (100145390).

161555602 is a wasteful number, since it uses less digits than its factorization.

161555602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17313.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 161555602 is about 12710.4524703096. The cubic root of 161555602 is about 544.6372492789.

The spelling of 161555602 in words is "one hundred sixty-one million, five hundred fifty-five thousand, six hundred two".