1863663494 has 32 divisors (see below), whose sum is σ = 3492986112. Its totient is φ = 724500000.

The previous prime is 1863663493. The next prime is 1863663497. The reversal of 1863663494 is 4943663681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1863663493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57869 + ... + 84119.

It is an arithmetic number, because the mean of its divisors is an integer number (109155816).

Almost surely, 2^1863663494 is an apocalyptic number.

1863663494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1863663494 is a deficient number, since it is larger than the sum of its proper divisors (1629322618).

1863663494 is a wasteful number, since it uses less digits than its factorization.

1863663494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26732.

The product of its digits is 2239488, while the sum is 50.

The square root of 1863663494 is about 43170.1690290877. The cubic root of 1863663494 is about 1230.6158358825.

The spelling of 1863663494 in words is "one billion, eight hundred sixty-three million, six hundred sixty-three thousand, four hundred ninety-four".