1817858974113 has 144 divisors (see below), whose sum is σ = 3320924131200. Its totient is φ = 957395956608.

The previous prime is 1817858974091. The next prime is 1817858974121. The reversal of 1817858974113 is 3114798587181.

1817858974113 is a `hidden beast` number, since 1 + 8 + 1 + 7 + 8 + 589 + 7 + 41 + 1 + 3 = 666.

It is not a de Polignac number, because 1817858974113 - 2¹⁴ = 1817858957729 is a prime.

It is a super-2 number, since 2×1817858974113² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1817858974153) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 394926870 + ... + 394931472.

Almost surely, 2^{1817858974113} is an apocalyptic number.

1817858974113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1817858974113 is a deficient number, since it is larger than the sum of its proper divisors (1503065157087).

1817858974113 is a wasteful number, since it uses less digits than its factorization.

1817858974113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413 (or 5383 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 63.

The spelling of 1817858974113 in words is "one trillion, eight hundred seventeen billion, eight hundred fifty-eight million, nine hundred seventy-four thousand, one hundred thirteen".