161738268774 has 16 divisors (see below), whose sum is σ = 325152584112. Its totient is φ = 53633415168.

The previous prime is 161738268773. The next prime is 161738268833. The reversal of 161738268774 is 477862837161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161738268773) 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, 69834019 + ... + 69836334.

It is an arithmetic number, because the mean of its divisors is an integer number (20322036507).

Almost surely, 2^161738268774 is an apocalyptic number.

161738268774 is an abundant number, since it is smaller than the sum of its proper divisors (163414315338).

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

161738268774 is a wasteful number, since it uses less digits than its factorization.

161738268774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139670551.

The product of its digits is 18966528, while the sum is 60.

The spelling of 161738268774 in words is "one hundred sixty-one billion, seven hundred thirty-eight million, two hundred sixty-eight thousand, seven hundred seventy-four".