1257915800563 has 2 divisors, whose sum is σ = 1257915800564. Its totient is φ = 1257915800562.

The previous prime is 1257915800539. The next prime is 1257915800629. The reversal of 1257915800563 is 3650085197521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1257915800563 is a prime.

It is a super-2 number, since 2×1257915800563² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1257915800563.

It is not a weakly prime, because it can be changed into another prime (1257915800363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628957900281 + 628957900282.

It is an arithmetic number, because the mean of its divisors is an integer number (628957900282).

Almost surely, 2^{1257915800563} is an apocalyptic number.

1257915800563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257915800563 is an equidigital number, since it uses as much as digits as its factorization.

1257915800563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268000, while the sum is 52.

The spelling of 1257915800563 in words is "one trillion, two hundred fifty-seven billion, nine hundred fifteen million, eight hundred thousand, five hundred sixty-three".