161653474 has 16 divisors (see below), whose sum is σ = 245035008. Its totient is φ = 79978752.

The previous prime is 161653441. The next prime is 161653483. The reversal of 161653474 is 474356161.

It is a super-2 number, since 2×161653474² = 52263691312537352, 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, 146007 + ... + 147109.

It is an arithmetic number, because the mean of its divisors is an integer number (15314688).

Almost surely, 2^161653474 is an apocalyptic number.

161653474 is a deficient number, since it is larger than the sum of its proper divisors (83381534).

161653474 is a wasteful number, since it uses less digits than its factorization.

161653474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809.

The product of its digits is 60480, while the sum is 37.

The square root of 161653474 is about 12714.3019470201. The cubic root of 161653474 is about 544.7472093085.

The spelling of 161653474 in words is "one hundred sixty-one million, six hundred fifty-three thousand, four hundred seventy-four".