245598691840 has 80 divisors (see below), whose sum is σ = 589162559040. Its totient is φ = 98189209600.

The previous prime is 245598691817. The next prime is 245598691859. The reversal of 245598691840 is 48196895542.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5196315 + ... + 5243365.

It is an arithmetic number, because the mean of its divisors is an integer number (7364531988).

Almost surely, 2^245598691840 is an apocalyptic number.

245598691840 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 245598691840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294581279520).

245598691840 is an abundant number, since it is smaller than the sum of its proper divisors (343563867200).

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

245598691840 is an equidigital number, since it uses as much as digits as its factorization.

245598691840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49113 (or 49097 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 61.

The spelling of 245598691840 in words is "two hundred forty-five billion, five hundred ninety-eight million, six hundred ninety-one thousand, eight hundred forty".