245242583820 has 336 divisors, whose sum is σ = 840193646880. Its totient is φ = 59740581888.

The previous prime is 245242583819. The next prime is 245242583849. The reversal of 245242583820 is 28385242542.

245242583820 is a `hidden beast` number, since 2 + 4 + 5 + 2 + 42 + 583 + 8 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 18378711 + ... + 18392049.

It is an arithmetic number, because the mean of its divisors is an integer number (2500576330).

Almost surely, 2^245242583820 is an apocalyptic number.

245242583820 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 245242583820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420096823440).

245242583820 is an abundant number, since it is smaller than the sum of its proper divisors (594951063060).

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

245242583820 is a wasteful number, since it uses less digits than its factorization.

245242583820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13476 (or 13459 counting only the distinct ones).

The product of its (nonzero) digits is 1228800, while the sum is 45.

The spelling of 245242583820 in words is "two hundred forty-five billion, two hundred forty-two million, five hundred eighty-three thousand, eight hundred twenty".