245651320643 has 2 divisors, whose sum is σ = 245651320644. Its totient is φ = 245651320642.

The previous prime is 245651320627. The next prime is 245651320751. The reversal of 245651320643 is 346023156542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245651320643 - 2⁴ = 245651320627 is a prime.

It is a super-3 number, since 3×245651320643³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 245651320643.

It is not a weakly prime, because it can be changed into another prime (245651326643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122825660321 + 122825660322.

It is an arithmetic number, because the mean of its divisors is an integer number (122825660322).

Almost surely, 2^245651320643 is an apocalyptic number.

245651320643 is a deficient number, since it is larger than the sum of its proper divisors (1).

245651320643 is an equidigital number, since it uses as much as digits as its factorization.

245651320643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 245651320643 in words is "two hundred forty-five billion, six hundred fifty-one million, three hundred twenty thousand, six hundred forty-three".