1263456140623 has 2 divisors, whose sum is σ = 1263456140624. Its totient is φ = 1263456140622.

The previous prime is 1263456140621. The next prime is 1263456140659. The reversal of 1263456140623 is 3260416543621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1263456140623 - 2¹ = 1263456140621 is a prime.

Together with 1263456140621, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1263456140623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263456140621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631728070311 + 631728070312.

It is an arithmetic number, because the mean of its divisors is an integer number (631728070312).

Almost surely, 2^{1263456140623} is an apocalyptic number.

1263456140623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263456140623 is an equidigital number, since it uses as much as digits as its factorization.

1263456140623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 1263456140623 in words is "one trillion, two hundred sixty-three billion, four hundred fifty-six million, one hundred forty thousand, six hundred twenty-three".