1183638538040 has 64 divisors (see below), whose sum is σ = 3203833651200. Its totient is φ = 384460034688.

The previous prime is 1183638538037. The next prime is 1183638538051. The reversal of 1183638538040 is 408358363811.

It is a self number, because there is not a number n which added to its sum of digits gives 1183638538040.

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, 111238904 + ... + 111249543.

It is an arithmetic number, because the mean of its divisors is an integer number (50059900800).

Almost surely, 2^{1183638538040} is an apocalyptic number.

1183638538040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1183638538040 is an abundant number, since it is smaller than the sum of its proper divisors (2020195113160).

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

1183638538040 is a wasteful number, since it uses less digits than its factorization.

1183638538040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222488484 (or 222488480 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 1183638538040 in words is "one trillion, one hundred eighty-three billion, six hundred thirty-eight million, five hundred thirty-eight thousand, forty".