245559816 has 64 divisors (see below), whose sum is σ = 690379200. Its totient is φ = 80861184.

The previous prime is 245559767. The next prime is 245559823. The reversal of 245559816 is 618955542.

245559816 is a `hidden beast` number, since 2 + 4 + 55 + 598 + 1 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11080 + ... + 24776.

It is an arithmetic number, because the mean of its divisors is an integer number (10787175).

Almost surely, 2^245559816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245559816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345189600).

245559816 is an abundant number, since it is smaller than the sum of its proper divisors (444819384).

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

245559816 is a wasteful number, since it uses less digits than its factorization.

245559816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13795 (or 13785 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The square root of 245559816 is about 15670.3483049995. The cubic root of 245559816 is about 626.2087039355.

The spelling of 245559816 in words is "two hundred forty-five million, five hundred fifty-nine thousand, eight hundred sixteen".