161247113644 has 48 divisors (see below), whose sum is σ = 305512445952. Its totient is φ = 74175487232.

The previous prime is 161247113641. The next prime is 161247113719. The reversal of 161247113644 is 446311742161.

It is a junction number, because it is equal to n+sod(n) for n = 161247113597 and 161247113606.

It is not an unprimeable number, because it can be changed into a prime (161247113641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2612589 + ... + 2673595.

It is an arithmetic number, because the mean of its divisors is an integer number (6364842624).

Almost surely, 2^161247113644 is an apocalyptic number.

It is an amenable number.

161247113644 is a deficient number, since it is larger than the sum of its proper divisors (144265332308).

161247113644 is a wasteful number, since it uses less digits than its factorization.

161247113644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61902 (or 61900 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The spelling of 161247113644 in words is "one hundred sixty-one billion, two hundred forty-seven million, one hundred thirteen thousand, six hundred forty-four".