1861486787104 has 24 divisors (see below), whose sum is σ = 4188345271488. Its totient is φ = 797780051520.

The previous prime is 1861486787093. The next prime is 1861486787131. The reversal of 1861486787104 is 4017876841681.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4155104212 + ... + 4155104659.

It is an arithmetic number, because the mean of its divisors is an integer number (174514386312).

Almost surely, 2^{1861486787104} is an apocalyptic number.

1861486787104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1861486787104 is an abundant number, since it is smaller than the sum of its proper divisors (2326858484384).

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

1861486787104 is an equidigital number, since it uses as much as digits as its factorization.

1861486787104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8310208888 (or 8310208880 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 61.

The spelling of 1861486787104 in words is "one trillion, eight hundred sixty-one billion, four hundred eighty-six million, seven hundred eighty-seven thousand, one hundred four".