1227891859458 has 96 divisors (see below), whose sum is σ = 2840669023680. Its totient is φ = 350494502400.

The previous prime is 1227891859387. The next prime is 1227891859471. The reversal of 1227891859458 is 8549581987221.

It is a junction number, because it is equal to n+sod(n) for n = 1227891859392 and 1227891859401.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3026616 + ... + 3408252.

It is an arithmetic number, because the mean of its divisors is an integer number (29590302330).

Almost surely, 2^{1227891859458} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1227891859458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1420334511840).

1227891859458 is an abundant number, since it is smaller than the sum of its proper divisors (1612777164222).

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

1227891859458 is a wasteful number, since it uses less digits than its factorization.

1227891859458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381764 (or 381723 counting only the distinct ones).

The product of its digits is 116121600, while the sum is 69.

The spelling of 1227891859458 in words is "one trillion, two hundred twenty-seven billion, eight hundred ninety-one million, eight hundred fifty-nine thousand, four hundred fifty-eight".