1802811268880 has 80 divisors (see below), whose sum is σ = 4287241585584. Its totient is φ = 704764968960.

The previous prime is 1802811268877. The next prime is 1802811268891. The reversal of 1802811268880 is 888621182081.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 300953104 + 1802510315776 = 17348^2 + 1342576^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (53).

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, 262460 + ... + 1916900.

Almost surely, 2^{1802811268880} is an apocalyptic number.

1802811268880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1802811268880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2143620792792).

1802811268880 is an abundant number, since it is smaller than the sum of its proper divisors (2484430316704).

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

1802811268880 is a wasteful number, since it uses less digits than its factorization.

1802811268880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654764 (or 1654758 counting only the distinct ones).

The product of its (nonzero) digits is 786432, while the sum is 53.

The spelling of 1802811268880 in words is "one trillion, eight hundred two billion, eight hundred eleven million, two hundred sixty-eight thousand, eight hundred eighty".