245091899520 has 896 divisors, whose sum is σ = 1002129816240. Its totient is φ = 56757583872.

The previous prime is 245091899471. The next prime is 245091899527. The reversal of 245091899520 is 25998190542.

245091899520 is a `hidden beast` number, since 2 + 4 + 509 + 1 + 89 + 9 + 52 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 81416632896 + 163675266624 = 285336^2 + 404568^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (245091899527) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 103108572 + ... + 103110948.

Almost surely, 2^245091899520 is an apocalyptic number.

245091899520 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 245091899520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501064908120).

245091899520 is an abundant number, since it is smaller than the sum of its proper divisors (757037916720).

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

245091899520 is a wasteful number, since it uses less digits than its factorization.

245091899520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444 (or 2417 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The spelling of 245091899520 in words is "two hundred forty-five billion, ninety-one million, eight hundred ninety-nine thousand, five hundred twenty".