161660242646 has 64 divisors (see below), whose sum is σ = 310505011200. Its totient is φ = 61493752320.

The previous prime is 161660242643. The next prime is 161660242687. The reversal of 161660242646 is 646242066161.

161660242646 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161660242646² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161660242597 and 161660242606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161660242643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180680 + ... + 596628.

It is an arithmetic number, because the mean of its divisors is an integer number (4851640800).

Almost surely, 2^161660242646 is an apocalyptic number.

161660242646 is a deficient number, since it is larger than the sum of its proper divisors (148844768554).

161660242646 is a wasteful number, since it uses less digits than its factorization.

161660242646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416069.

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 161660242646 in words is "one hundred sixty-one billion, six hundred sixty million, two hundred forty-two thousand, six hundred forty-six".