245636500640 has 192 divisors, whose sum is σ = 636582512160. Its totient is φ = 89153863680.

The previous prime is 245636500597. The next prime is 245636500679. The reversal of 245636500640 is 46005636542.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 8860833424 + 236775667216 = 94132^2 + 486596^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64758584 + ... + 64762376.

Almost surely, 2^245636500640 is an apocalyptic number.

245636500640 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 245636500640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318291256080).

245636500640 is an abundant number, since it is smaller than the sum of its proper divisors (390946011520).

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

245636500640 is a wasteful number, since it uses less digits than its factorization.

245636500640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4675 (or 4667 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 245636500640 in words is "two hundred forty-five billion, six hundred thirty-six million, five hundred thousand, six hundred forty".