245821620000 has 480 divisors, whose sum is σ = 925992587520. Its totient is φ = 56453760000.

The previous prime is 245821619999. The next prime is 245821620017. The reversal of 245821620000 is 26128542.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 245821620000.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12530199 + ... + 12549801.

It is an arithmetic number, because the mean of its divisors is an integer number (1929151224).

Almost surely, 2^245821620000 is an apocalyptic number.

245821620000 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 245821620000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462996293760).

245821620000 is an abundant number, since it is smaller than the sum of its proper divisors (680170967520).

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

245821620000 is a wasteful number, since it uses less digits than its factorization.

245821620000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19666 (or 19643 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 245821620000 its reverse (26128542), we get a palindrome (245847748542).

The spelling of 245821620000 in words is "two hundred forty-five billion, eight hundred twenty-one million, six hundred twenty thousand".