161868672908616 has 32 divisors (see below), whose sum is σ = 404829942762240. Its totient is φ = 53935122904128.

The previous prime is 161868672908609. The next prime is 161868672908617. The reversal of 161868672908616 is 616809276868161.

It is not an unprimeable number, because it can be changed into a prime (161868672908617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1318774776 + ... + 1318897511.

It is an arithmetic number, because the mean of its divisors is an integer number (12650935711320).

Almost surely, 2^{161868672908616} is an apocalyptic number.

It is an amenable number.

161868672908616 is an abundant number, since it is smaller than the sum of its proper divisors (242961269853624).

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

161868672908616 is a wasteful number, since it uses less digits than its factorization.

161868672908616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637674853 (or 2637674849 counting only the distinct ones).

The product of its (nonzero) digits is 501645312, while the sum is 75.

The spelling of 161868672908616 in words is "one hundred sixty-one trillion, eight hundred sixty-eight billion, six hundred seventy-two million, nine hundred eight thousand, six hundred sixteen".