1866298580940 has 96 divisors (see below), whose sum is σ = 5354522933760. Its totient is φ = 485436542976.

The previous prime is 1866298580917. The next prime is 1866298580987. The reversal of 1866298580940 is 490858926681.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1378156 + ... + 2373164.

It is an arithmetic number, because the mean of its divisors is an integer number (55776280560).

Almost surely, 2^{1866298580940} is an apocalyptic number.

1866298580940 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 1866298580940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2677261466880).

1866298580940 is an abundant number, since it is smaller than the sum of its proper divisors (3488224352820).

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

1866298580940 is a wasteful number, since it uses less digits than its factorization.

1866298580940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995791 (or 995789 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 66.

The spelling of 1866298580940 in words is "one trillion, eight hundred sixty-six billion, two hundred ninety-eight million, five hundred eighty thousand, nine hundred forty".