245567778 has 16 divisors (see below), whose sum is σ = 503114976. Its totient is φ = 79859360.

The previous prime is 245567767. The next prime is 245567831. The reversal of 245567778 is 877765542.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 245567778.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498876 + ... + 499367.

It is an arithmetic number, because the mean of its divisors is an integer number (31444686).

Almost surely, 2^245567778 is an apocalyptic number.

245567778 is an abundant number, since it is smaller than the sum of its proper divisors (257547198).

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

245567778 is a wasteful number, since it uses less digits than its factorization.

245567778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998289.

The product of its digits is 3292800, while the sum is 51.

The square root of 245567778 is about 15670.6023496227. The cubic root of 245567778 is about 626.2154718992.

The spelling of 245567778 in words is "two hundred forty-five million, five hundred sixty-seven thousand, seven hundred seventy-eight".