161307943256 has 32 divisors (see below), whose sum is σ = 303986450880. Its totient is φ = 80245888800.

The previous prime is 161307943243. The next prime is 161307943301. The reversal of 161307943256 is 652349703161.

161307943256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 161307943256.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1238135 + ... + 1362201.

It is an arithmetic number, because the mean of its divisors is an integer number (9499576590).

Almost surely, 2^161307943256 is an apocalyptic number.

It is an amenable number.

161307943256 is a deficient number, since it is larger than the sum of its proper divisors (142678507624).

161307943256 is a wasteful number, since it uses less digits than its factorization.

161307943256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124895 (or 124891 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 161307943256 in words is "one hundred sixty-one billion, three hundred seven million, nine hundred forty-three thousand, two hundred fifty-six".