1861163386 has 8 divisors (see below), whose sum is σ = 2833413120. Its totient is φ = 916692348.

The previous prime is 1861163377. The next prime is 1861163407. The reversal of 1861163386 is 6833611681.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 6944506 + ... + 6944773.

It is an arithmetic number, because the mean of its divisors is an integer number (354176640).

Almost surely, 2^1861163386 is an apocalyptic number.

1861163386 is a deficient number, since it is larger than the sum of its proper divisors (972249734).

1861163386 is a wasteful number, since it uses less digits than its factorization.

1861163386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13889348.

The product of its digits is 124416, while the sum is 43.

The square root of 1861163386 is about 43141.2028807728. The cubic root of 1861163386 is about 1230.0652984921.

The spelling of 1861163386 in words is "one billion, eight hundred sixty-one million, one hundred sixty-three thousand, three hundred eighty-six".