1863428555 has 8 divisors (see below), whose sum is σ = 2241164592. Its totient is φ = 1487375968.

The previous prime is 1863428533. The next prime is 1863428563. The reversal of 1863428555 is 5558243681.

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

It is a cyclic number.

It is not a de Polignac number, because 1863428555 - 2¹⁴ = 1863412171 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418424 + ... + 422853.

It is an arithmetic number, because the mean of its divisors is an integer number (280145574).

Almost surely, 2^1863428555 is an apocalyptic number.

1863428555 is a deficient number, since it is larger than the sum of its proper divisors (377736037).

1863428555 is an equidigital number, since it uses as much as digits as its factorization.

1863428555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841725.

The product of its digits is 1152000, while the sum is 47.

The square root of 1863428555 is about 43167.4478629441. The cubic root of 1863428555 is about 1230.5641220037.

The spelling of 1863428555 in words is "one billion, eight hundred sixty-three million, four hundred twenty-eight thousand, five hundred fifty-five".