1563256255641 has 8 divisors (see below), whose sum is σ = 2087185253760. Its totient is φ = 1040749047312.

The previous prime is 1563256255607. The next prime is 1563256255721. The reversal of 1563256255641 is 1465526523651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1563256255641 - 2²¹ = 1563254158489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1563256255241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355444881 + ... + 355449278.

It is an arithmetic number, because the mean of its divisors is an integer number (260898156720).

Almost surely, 2^{1563256255641} is an apocalyptic number.

It is an amenable number.

1563256255641 is a deficient number, since it is larger than the sum of its proper divisors (523928998119).

1563256255641 is an equidigital number, since it uses as much as digits as its factorization.

1563256255641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710894895.

The product of its digits is 6480000, while the sum is 51.

The spelling of 1563256255641 in words is "one trillion, five hundred sixty-three billion, two hundred fifty-six million, two hundred fifty-five thousand, six hundred forty-one".