245517905340 has 72 divisors (see below), whose sum is σ = 760583154240. Its totient is φ = 64078429824.

The previous prime is 245517905309. The next prime is 245517905389. The reversal of 245517905340 is 43509715542.

245517905340 is a `hidden beast` number, since 2 + 4 + 5 + 517 + 90 + 5 + 3 + 40 = 666.

245517905340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14502055 + ... + 14518974.

It is an arithmetic number, because the mean of its divisors is an integer number (10563654920).

Almost surely, 2^245517905340 is an apocalyptic number.

245517905340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245517905340 is an abundant number, since it is smaller than the sum of its proper divisors (515065248900).

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

245517905340 is a wasteful number, since it uses less digits than its factorization.

245517905340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29021091 (or 29021086 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 245517905340 in words is "two hundred forty-five billion, five hundred seventeen million, nine hundred five thousand, three hundred forty".