254788865563 has 6 divisors (see below), whose sum is σ = 258595877876. Its totient is φ = 250981976652.

The previous prime is 254788865537. The next prime is 254788865629. The reversal of 254788865563 is 365568887452.

It is not a de Polignac number, because 254788865563 - 2⁵ = 254788865531 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254782865563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4100856 + ... + 4162522.

Almost surely, 2^254788865563 is an apocalyptic number.

254788865563 is a deficient number, since it is larger than the sum of its proper divisors (3807012313).

254788865563 is an frugal number, since it uses more digits than its factorization.

254788865563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123401 (or 61734 counting only the distinct ones).

The product of its digits is 387072000, while the sum is 67.

Multiplying 254788865563 by its sum of digits (67), we get a square (17070853992721 = 4131689²).

254788865563 divided by its sum of digits (67) gives a square (3802818889 = 61667²).

The spelling of 254788865563 in words is "two hundred fifty-four billion, seven hundred eighty-eight million, eight hundred sixty-five thousand, five hundred sixty-three".