161026745544 has 48 divisors (see below), whose sum is σ = 498416118720. Its totient is φ = 46007641440.

The previous prime is 161026745531. The next prime is 161026745563. The reversal of 161026745544 is 445547620161.

161026745544 is a `hidden beast` number, since 1 + 6 + 1 + 0 + 2 + 67 + 45 + 544 = 666.

161026745544 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 2×161026745544² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161026745544.

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 11 ways as a sum of consecutive naturals, for example, 159748252 + ... + 159749259.

It is an arithmetic number, because the mean of its divisors is an integer number (10383669140).

Almost surely, 2^161026745544 is an apocalyptic number.

161026745544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161026745544 is an abundant number, since it is smaller than the sum of its proper divisors (337389373176).

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

161026745544 is a wasteful number, since it uses less digits than its factorization.

161026745544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319497530 (or 319497523 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 161026745544 in words is "one hundred sixty-one billion, twenty-six million, seven hundred forty-five thousand, five hundred forty-four".