1836881459856 has 135 divisors (see below), whose sum is σ = 5242001487177. Its totient is φ = 600459200640.

The previous prime is 1836881459813. The next prime is 1836881459873. The reversal of 1836881459856 is 6589541886381.

The square root of 1836881459856 is 1355316.

It is a perfect power (a square), and thus also a powerful number.

1836881459856 is a `hidden beast` number, since 18 + 3 + 6 + 8 + 8 + 14 + 598 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1324202547600 + 512678912256 = 1150740^2 + 716016^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 861979911 + ... + 861982041.

Almost surely, 2^{1836881459856} is an apocalyptic number.

1836881459856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1836881459856 is the 1355316-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1836881459856

1836881459856 is an abundant number, since it is smaller than the sum of its proper divisors (3405120027321).

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

1836881459856 is an frugal number, since it uses more digits than its factorization.

1836881459856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4382 (or 2189 counting only the distinct ones).

The product of its digits is 398131200, while the sum is 72.

The spelling of 1836881459856 in words is "one trillion, eight hundred thirty-six billion, eight hundred eighty-one million, four hundred fifty-nine thousand, eight hundred fifty-six".