245642637792 has 48 divisors (see below), whose sum is σ = 644880120192. Its totient is φ = 81872219520.

The previous prime is 245642637763. The next prime is 245642637839. The reversal of 245642637792 is 297736246542.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent 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, 811453 + ... + 1072259.

It is an arithmetic number, because the mean of its divisors is an integer number (13435002504).

Almost surely, 2^245642637792 is an apocalyptic number.

It is an amenable number.

245642637792 is an abundant number, since it is smaller than the sum of its proper divisors (399237482400).

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

245642637792 is a wasteful number, since it uses less digits than its factorization.

245642637792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270631 (or 270623 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 57.

The spelling of 245642637792 in words is "two hundred forty-five billion, six hundred forty-two million, six hundred thirty-seven thousand, seven hundred ninety-two".