1081633278 has 48 divisors (see below), whose sum is σ = 2428473600. Its totient is φ = 320783760.

The previous prime is 1081633199. The next prime is 1081633297. The reversal of 1081633278 is 8723361801.

1081633278 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18273 + ... + 49971.

It is an arithmetic number, because the mean of its divisors is an integer number (50593200).

Almost surely, 2^1081633278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1081633278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1214236800).

1081633278 is an abundant number, since it is smaller than the sum of its proper divisors (1346840322).

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

1081633278 is a wasteful number, since it uses less digits than its factorization.

1081633278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31773 (or 31762 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 1081633278 is about 32888.1935958787. The cubic root of 1081633278 is about 1026.5025049314.

The spelling of 1081633278 in words is "one billion, eighty-one million, six hundred thirty-three thousand, two hundred seventy-eight".