1863563226 has 16 divisors (see below), whose sum is σ = 4259573184. Its totient is φ = 532446624.

The previous prime is 1863563213. The next prime is 1863563279. The reversal of 1863563226 is 6223653681.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 44370553 = 1863563226 / (1 + 8 + 6 + 3 + 5 + 6 + 3 + 2 + 2 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22185235 + ... + 22185318.

It is an arithmetic number, because the mean of its divisors is an integer number (266223324).

Almost surely, 2^1863563226 is an apocalyptic number.

1863563226 is an abundant number, since it is smaller than the sum of its proper divisors (2396009958).

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

1863563226 is a wasteful number, since it uses less digits than its factorization.

1863563226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44370565.

The product of its digits is 311040, while the sum is 42.

The square root of 1863563226 is about 43169.0077022857. The cubic root of 1863563226 is about 1230.5937658035.

The spelling of 1863563226 in words is "one billion, eight hundred sixty-three million, five hundred sixty-three thousand, two hundred twenty-six".