1601615166 has 16 divisors (see below), whose sum is σ = 3342501504. Its totient is φ = 510659864.

The previous prime is 1601615159. The next prime is 1601615177. The reversal of 1601615166 is 6615161061.

It is a super-2 number, since 2×1601615166² = 5130342279922415112, which contains 22 as substring.

It is a congruent number.

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, 5802816 + ... + 5803091.

It is an arithmetic number, because the mean of its divisors is an integer number (208906344).

Almost surely, 2^1601615166 is an apocalyptic number.

1601615166 is an abundant number, since it is smaller than the sum of its proper divisors (1740886338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1601615166 is a wasteful number, since it uses less digits than its factorization.

1601615166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11605935.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 1601615166 is about 40020.1844823334. The cubic root of 1601615166 is about 1170.0005274305. Note that the first 3 decimals are identical.

The spelling of 1601615166 in words is "one billion, six hundred one million, six hundred fifteen thousand, one hundred sixty-six".