1861110680 has 128 divisors (see below), whose sum is σ = 4962081600. Its totient is φ = 624476160.

The previous prime is 1861110679. The next prime is 1861110689. The reversal of 1861110680 is 860111681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861110689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 690776 + ... + 693464.

Almost surely, 2^1861110680 is an apocalyptic number.

1861110680 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 1861110680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2481040800).

1861110680 is an abundant number, since it is smaller than the sum of its proper divisors (3100970920).

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

1861110680 is a wasteful number, since it uses less digits than its factorization.

1861110680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746 (or 2720 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 1861110680 is about 43140.5920218997. The cubic root of 1861110680 is about 1230.0536870391.

The spelling of 1861110680 in words is "one billion, eight hundred sixty-one million, one hundred ten thousand, six hundred eighty".