161553274442 has 128 divisors (see below), whose sum is σ = 304273981440. Its totient is φ = 62797109760.

The previous prime is 161553274391. The next prime is 161553274457. The reversal of 161553274442 is 244472355161.

161553274442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161553274442² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161553274393 and 161553274402.

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 63 ways as a sum of consecutive naturals, for example, 159479528 + ... + 159480540.

It is an arithmetic number, because the mean of its divisors is an integer number (2377140480).

Almost surely, 2^161553274442 is an apocalyptic number.

161553274442 is a deficient number, since it is larger than the sum of its proper divisors (142720706998).

161553274442 is a wasteful number, since it uses less digits than its factorization.

161553274442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348.

The product of its digits is 806400, while the sum is 44.

The spelling of 161553274442 in words is "one hundred sixty-one billion, five hundred fifty-three million, two hundred seventy-four thousand, four hundred forty-two".