245559680500 has 72 divisors (see below), whose sum is σ = 549541668312. Its totient is φ = 95800480000.

The previous prime is 245559680453. The next prime is 245559680521. The reversal of 245559680500 is 5086955542.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 245274543504 + 285136996 = 495252^2 + 16886^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70948770 + ... + 70952230.

It is an arithmetic number, because the mean of its divisors is an integer number (7632523171).

Almost surely, 2^245559680500 is an apocalyptic number.

245559680500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245559680500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274770834156).

245559680500 is an abundant number, since it is smaller than the sum of its proper divisors (303981987812).

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

245559680500 is an frugal number, since it uses more digits than its factorization.

245559680500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6982 (or 3509 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 49.

The spelling of 245559680500 in words is "two hundred forty-five billion, five hundred fifty-nine million, six hundred eighty thousand, five hundred".