1863613064 has 16 divisors (see below), whose sum is σ = 3500339100. Its totient is φ = 930189312.

The previous prime is 1863613039. The next prime is 1863613099. The reversal of 1863613064 is 4603163681.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1653072964 + 210540100 = 40658^2 + 14510^2 .

It is a super-2 number, since 2×1863613064² = 6946107304622936192, which contains 22 as substring.

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, 197249 + ... + 206480.

Almost surely, 2^1863613064 is an apocalyptic number.

It is an amenable number.

1863613064 is a deficient number, since it is larger than the sum of its proper divisors (1636726036).

1863613064 is a wasteful number, since it uses less digits than its factorization.

1863613064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404312 (or 404308 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 1863613064 is about 43169.5849412523. The cubic root of 1863613064 is about 1230.6047357891.

The spelling of 1863613064 in words is "one billion, eight hundred sixty-three million, six hundred thirteen thousand, sixty-four".