161623464 has 32 divisors (see below), whose sum is σ = 405100320. Its totient is φ = 53735616.

The previous prime is 161623439. The next prime is 161623489. The reversal of 161623464 is 464326161.

It is an interprime number because it is at equal distance from previous prime (161623439) and next prime (161623489).

It is a super-2 number, since 2×161623464² = 52244288230718592, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 1047 + ... + 18009.

It is an arithmetic number, because the mean of its divisors is an integer number (12659385).

Almost surely, 2^161623464 is an apocalyptic number.

It is an amenable number.

161623464 is an abundant number, since it is smaller than the sum of its proper divisors (243476856).

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

161623464 is a wasteful number, since it uses less digits than its factorization.

161623464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17369 (or 17365 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 161623464 is about 12713.1217252097. The cubic root of 161623464 is about 544.7134975358.

The spelling of 161623464 in words is "one hundred sixty-one million, six hundred twenty-three thousand, four hundred sixty-four".