1813541864392 has 64 divisors (see below), whose sum is σ = 3428579145600. Its totient is φ = 899294016000.

The previous prime is 1813541864357. The next prime is 1813541864419. The reversal of 1813541864392 is 2934681453181.

It is a super-2 number, since 2×1813541864392² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

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, 531361278 + ... + 531364690.

It is an arithmetic number, because the mean of its divisors is an integer number (53571549150).

Almost surely, 2^{1813541864392} is an apocalyptic number.

It is an amenable number.

1813541864392 is a deficient number, since it is larger than the sum of its proper divisors (1615037281208).

1813541864392 is a wasteful number, since it uses less digits than its factorization.

1813541864392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4726 (or 4722 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 55.

The spelling of 1813541864392 in words is "one trillion, eight hundred thirteen billion, five hundred forty-one million, eight hundred sixty-four thousand, three hundred ninety-two".