245899645992 has 512 divisors, whose sum is σ = 919470182400. Its totient is φ = 58805222400.

The previous prime is 245899645897. The next prime is 245899645993. The reversal of 245899645992 is 299546998542.

245899645992 is a `hidden beast` number, since 2 + 4 + 5 + 89 + 9 + 6 + 459 + 92 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 245899645992.

It is not an unprimeable number, because it can be changed into a prime (245899645993) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 99674343 + ... + 99676809.

It is an arithmetic number, because the mean of its divisors is an integer number (1795840200).

Almost surely, 2^245899645992 is an apocalyptic number.

245899645992 is a gapful number since it is divisible by the number (22) 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 245899645992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459735091200).

245899645992 is an abundant number, since it is smaller than the sum of its proper divisors (673570536408).

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

245899645992 is a wasteful number, since it uses less digits than its factorization.

245899645992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2974 (or 2964 counting only the distinct ones).

The product of its digits is 503884800, while the sum is 72.

The spelling of 245899645992 in words is "two hundred forty-five billion, eight hundred ninety-nine million, six hundred forty-five thousand, nine hundred ninety-two".