161284126458 has 128 divisors (see below), whose sum is σ = 417660364800. Its totient is φ = 40373367552.

The previous prime is 161284126397. The next prime is 161284126463. The reversal of 161284126458 is 854621482161.

161284126458 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 847885 + ... + 1020527.

It is an arithmetic number, because the mean of its divisors is an integer number (3262971600).

Almost surely, 2^161284126458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161284126458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208830182400).

161284126458 is an abundant number, since it is smaller than the sum of its proper divisors (256376238342).

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

161284126458 is a wasteful number, since it uses less digits than its factorization.

161284126458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172756.

The product of its digits is 737280, while the sum is 48.

The spelling of 161284126458 in words is "one hundred sixty-one billion, two hundred eighty-four million, one hundred twenty-six thousand, four hundred fifty-eight".