1139781055 has 16 divisors (see below), whose sum is σ = 1617030720. Its totient is φ = 754612992.

The previous prime is 1139781053. The next prime is 1139781079. The reversal of 1139781055 is 5501879311.

It is not a de Polignac number, because 1139781055 - 2¹ = 1139781053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1139780999 and 1139781017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139781053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560454 + ... + 562483.

It is an arithmetic number, because the mean of its divisors is an integer number (101064420).

Almost surely, 2^1139781055 is an apocalyptic number.

1139781055 is a deficient number, since it is larger than the sum of its proper divisors (477249665).

1139781055 is a wasteful number, since it uses less digits than its factorization.

1139781055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122978.

The product of its (nonzero) digits is 37800, while the sum is 40.

The square root of 1139781055 is about 33760.6435809509. The cubic root of 1139781055 is about 1044.5770454748.

The spelling of 1139781055 in words is "one billion, one hundred thirty-nine million, seven hundred eighty-one thousand, fifty-five".