1863564425 has 6 divisors (see below), whose sum is σ = 2310819918. Its totient is φ = 1490851520.

The previous prime is 1863564413. The next prime is 1863564467. The reversal of 1863564425 is 5244653681.

It can be written as a sum of positive squares in 3 ways, for example, as 9314704 + 1854249721 = 3052^2 + 43061^2 .

It is not a de Polignac number, because 1863564425 - 2⁸ = 1863564169 is a prime.

It is a super-2 number, since 2×1863564425² = 6945744732251161250, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 37271264 + ... + 37271313.

It is an arithmetic number, because the mean of its divisors is an integer number (385136653).

Almost surely, 2^1863564425 is an apocalyptic number.

It is an amenable number.

1863564425 is a deficient number, since it is larger than the sum of its proper divisors (447255493).

1863564425 is an equidigital number, since it uses as much as digits as its factorization.

1863564425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74542587 (or 74542582 counting only the distinct ones).

The product of its digits is 691200, while the sum is 44.

The square root of 1863564425 is about 43169.0215895612. The cubic root of 1863564425 is about 1230.5940297211.

The spelling of 1863564425 in words is "one billion, eight hundred sixty-three million, five hundred sixty-four thousand, four hundred twenty-five".