1863681634 has 8 divisors (see below), whose sum is σ = 2805838848. Its totient is φ = 928402020.

The previous prime is 1863681629. The next prime is 1863681637. The reversal of 1863681634 is 4361863681.

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

It is a super-5 number, since 5×1863681634⁵ (a number of 48 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (1863681637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1718722 + ... + 1719805.

It is an arithmetic number, because the mean of its divisors is an integer number (350729856).

Almost surely, 2^1863681634 is an apocalyptic number.

1863681634 is a deficient number, since it is larger than the sum of its proper divisors (942157214).

1863681634 is a wasteful number, since it uses less digits than its factorization.

1863681634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438800.

The product of its digits is 497664, while the sum is 46.

The square root of 1863681634 is about 43170.3791273600. The cubic root of 1863681634 is about 1230.6198286095.

The spelling of 1863681634 in words is "one billion, eight hundred sixty-three million, six hundred eighty-one thousand, six hundred thirty-four".