161623896 has 64 divisors (see below), whose sum is σ = 488954880. Its totient is φ = 43461120.

The previous prime is 161623867. The next prime is 161623897. The reversal of 161623896 is 698326161.

It is a super-2 number, since 2×161623896² = 52244567516437632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161623897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25440 + ... + 31151.

It is an arithmetic number, because the mean of its divisors is an integer number (7639920).

Almost surely, 2^161623896 is an apocalyptic number.

It is an amenable number.

161623896 is an abundant number, since it is smaller than the sum of its proper divisors (327330984).

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

161623896 is a wasteful number, since it uses less digits than its factorization.

161623896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56624 (or 56620 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 161623896 is about 12713.1387155179. The cubic root of 161623896 is about 544.7139828532.

The spelling of 161623896 in words is "one hundred sixty-one million, six hundred twenty-three thousand, eight hundred ninety-six".