1145181815838 has 48 divisors (see below), whose sum is σ = 2561846317056. Its totient is φ = 369329913360.

The previous prime is 1145181815837. The next prime is 1145181815839. The reversal of 1145181815838 is 8385181815411.

1145181815838 is a `hidden beast` number, since 1 + 1 + 4 + 51 + 8 + 1 + 8 + 1 + 583 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1145181815837) and next prime (1145181815839).

It is a super-2 number, since 2×1145181815838² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145181815837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2260431 + ... + 2720277.

It is an arithmetic number, because the mean of its divisors is an integer number (53371798272).

Almost surely, 2^{1145181815838} is an apocalyptic number.

1145181815838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1145181815838 is an abundant number, since it is smaller than the sum of its proper divisors (1416664501218).

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

1145181815838 is a wasteful number, since it uses less digits than its factorization.

1145181815838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464349 (or 464346 counting only the distinct ones).

The product of its digits is 1228800, while the sum is 54.

The spelling of 1145181815838 in words is "one trillion, one hundred forty-five billion, one hundred eighty-one million, eight hundred fifteen thousand, eight hundred thirty-eight".