1139418945 has 48 divisors (see below), whose sum is σ = 2309653632. Its totient is φ = 508757760.

The previous prime is 1139418913. The next prime is 1139418949. The reversal of 1139418945 is 5498149311.

It is not a de Polignac number, because 1139418945 - 2⁵ = 1139418913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1139418945.

It is not an unprimeable number, because it can be changed into a prime (1139418949) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28516 + ... + 55605.

It is an arithmetic number, because the mean of its divisors is an integer number (48117784).

Almost surely, 2^1139418945 is an apocalyptic number.

1139418945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1139418945 is an abundant number, since it is smaller than the sum of its proper divisors (1170234687).

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

1139418945 is a wasteful number, since it uses less digits than its factorization.

1139418945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84182 (or 84179 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 1139418945 is about 33755.2802536137. The cubic root of 1139418945 is about 1044.4664125726.

The spelling of 1139418945 in words is "one billion, one hundred thirty-nine million, four hundred eighteen thousand, nine hundred forty-five".