245564566 has 32 divisors (see below), whose sum is σ = 409264128. Its totient is φ = 109792800.

The previous prime is 245564563. The next prime is 245564567. The reversal of 245564566 is 665465542.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245564563) 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, 124891 + ... + 126841.

It is an arithmetic number, because the mean of its divisors is an integer number (12789504).

Almost surely, 2^245564566 is an apocalyptic number.

245564566 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

245564566 is a deficient number, since it is larger than the sum of its proper divisors (163699562).

245564566 is a wasteful number, since it uses less digits than its factorization.

245564566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116.

The product of its digits is 864000, while the sum is 43.

The square root of 245564566 is about 15670.4998643949. The cubic root of 245564566 is about 626.2127416104.

The spelling of 245564566 in words is "two hundred forty-five million, five hundred sixty-four thousand, five hundred sixty-six".