73661568 has 32 divisors (see below), whose sum is σ = 195664560. Its totient is φ = 24553728.

The previous prime is 73661563. The next prime is 73661591. The reversal of 73661568 is 86516637.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (73661563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95530 + ... + 96297.

Almost surely, 2^73661568 is an apocalyptic number.

It is an amenable number.

73661568 is an abundant number, since it is smaller than the sum of its proper divisors (122002992).

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

73661568 is a wasteful number, since it uses less digits than its factorization.

73661568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191844 (or 191832 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 73661568 is about 8582.6317642085. The cubic root of 73661568 is about 419.1926440447.

The spelling of 73661568 in words is "seventy-three million, six hundred sixty-one thousand, five hundred sixty-eight".