1255768647 has 16 divisors (see below), whose sum is σ = 1916052480. Its totient is φ = 716644512.

The previous prime is 1255768639. The next prime is 1255768663. The reversal of 1255768647 is 7468675521.

It is not a de Polignac number, because 1255768647 - 2³ = 1255768639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1255768647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255768667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22447 + ... + 54912.

It is an arithmetic number, because the mean of its divisors is an integer number (119753280).

Almost surely, 2^1255768647 is an apocalyptic number.

1255768647 is a deficient number, since it is larger than the sum of its proper divisors (660283833).

1255768647 is an equidigital number, since it uses as much as digits as its factorization.

1255768647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78142.

The product of its digits is 2822400, while the sum is 51.

The square root of 1255768647 is about 35436.8261417413. The cubic root of 1255768647 is about 1078.8718921820.

The spelling of 1255768647 in words is "one billion, two hundred fifty-five million, seven hundred sixty-eight thousand, six hundred forty-seven".