245771343337640 has 16 divisors (see below), whose sum is σ = 552985522509780. Its totient is φ = 98308537335040.

The previous prime is 245771343337501. The next prime is 245771343337643. The reversal of 245771343337640 is 46733343177542.

It can be written as a sum of positive squares in 2 ways, for example, as 243280571282116 + 2490772055524 = 15597454^2 + 1578218^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 245771343337640.

It is not an unprimeable number, because it can be changed into a prime (245771343337643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3072141791681 + ... + 3072141791760.

Almost surely, 2^{245771343337640} is an apocalyptic number.

245771343337640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245771343337640 is an abundant number, since it is smaller than the sum of its proper divisors (307214179172140).

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

245771343337640 is a wasteful number, since it uses less digits than its factorization.

245771343337640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6144283583452 (or 6144283583448 counting only the distinct ones).

The product of its (nonzero) digits is 106686720, while the sum is 59.

The spelling of 245771343337640 in words is "two hundred forty-five trillion, seven hundred seventy-one billion, three hundred forty-three million, three hundred thirty-seven thousand, six hundred forty".