1255764863 has 4 divisors (see below), whose sum is σ = 1255840800. Its totient is φ = 1255688928.

The previous prime is 1255764827. The next prime is 1255764869. The reversal of 1255764863 is 3684675521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1255764863 - 2⁶ = 1255764799 is a prime.

It is a super-2 number, since 2×1255764863² = 3153890782290817538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255764869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1463 + ... + 50136.

It is an arithmetic number, because the mean of its divisors is an integer number (313960200).

Almost surely, 2^1255764863 is an apocalyptic number.

1255764863 is a deficient number, since it is larger than the sum of its proper divisors (75937).

1255764863 is an equidigital number, since it uses as much as digits as its factorization.

1255764863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75936.

The product of its digits is 1209600, while the sum is 47.

The square root of 1255764863 is about 35436.7727509151. The cubic root of 1255764863 is about 1078.8708085282.

The spelling of 1255764863 in words is "one billion, two hundred fifty-five million, seven hundred sixty-four thousand, eight hundred sixty-three".