320416661616 has 40 divisors (see below), whose sum is σ = 830667964800. Its totient is φ = 106428144576.

The previous prime is 320416661603. The next prime is 320416661627. The reversal of 320416661616 is 616166614023.

It is a super-2 number, since 2×320416661616² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 11780316 + ... + 11807483.

It is an arithmetic number, because the mean of its divisors is an integer number (20766699120).

Almost surely, 2^320416661616 is an apocalyptic number.

It is an amenable number.

320416661616 is an abundant number, since it is smaller than the sum of its proper divisors (510251303184).

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

320416661616 is a wasteful number, since it uses less digits than its factorization.

320416661616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23588093 (or 23588087 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 320416661616 in words is "three hundred twenty billion, four hundred sixteen million, six hundred sixty-one thousand, six hundred sixteen".