161629568 has 16 divisors (see below), whose sum is σ = 321996660. Its totient is φ = 80814720.

The previous prime is 161629553. The next prime is 161629577. The reversal of 161629568 is 865926161.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×161629568² = 52248234503733248, 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 as a sum of consecutive naturals, namely, 631238 + ... + 631493.

Almost surely, 2^161629568 is an apocalyptic number.

It is an amenable number.

161629568 is a deficient number, since it is larger than the sum of its proper divisors (160367092).

161629568 is an equidigital number, since it uses as much as digits as its factorization.

161629568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262745 (or 1262733 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 161629568 is about 12713.3617898650. The cubic root of 161629568 is about 544.7203548102.

The spelling of 161629568 in words is "one hundred sixty-one million, six hundred twenty-nine thousand, five hundred sixty-eight".