1816255373388 has 48 divisors (see below), whose sum is σ = 4296215911680. Its totient is φ = 597141203904.

The previous prime is 1816255373381. The next prime is 1816255373419. The reversal of 1816255373388 is 8833735526181.

It is not an unprimeable number, because it can be changed into a prime (1816255373381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2794456 + ... + 3382527.

It is an arithmetic number, because the mean of its divisors is an integer number (89504498160).

Almost surely, 2^{1816255373388} is an apocalyptic number.

It is an amenable number.

1816255373388 is an abundant number, since it is smaller than the sum of its proper divisors (2479960538292).

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

1816255373388 is a wasteful number, since it uses less digits than its factorization.

1816255373388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6177326 (or 6177324 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 60.

The spelling of 1816255373388 in words is "one trillion, eight hundred sixteen billion, two hundred fifty-five million, three hundred seventy-three thousand, three hundred eighty-eight".