1139641056 has 96 divisors (see below), whose sum is σ = 3373735680. Its totient is φ = 374191488.

The previous prime is 1139641049. The next prime is 1139641073. The reversal of 1139641056 is 6501469311.

1139641056 is a `hidden beast` number, since 1 + 1 + 3 + 9 + 641 + 0 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1139641056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48045 + ... + 67731.

It is an arithmetic number, because the mean of its divisors is an integer number (35143080).

Almost surely, 2^1139641056 is an apocalyptic number.

1139641056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1139641056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1686867840).

1139641056 is an abundant number, since it is smaller than the sum of its proper divisors (2234094624).

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

1139641056 is a wasteful number, since it uses less digits than its factorization.

1139641056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19773 (or 19759 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1139641056 is about 33758.5701118990. The cubic root of 1139641056 is about 1044.5342753512.

The spelling of 1139641056 in words is "one billion, one hundred thirty-nine million, six hundred forty-one thousand, fifty-six".