1255656664 has 32 divisors (see below), whose sum is σ = 2458667520. Its totient is φ = 600055456.

The previous prime is 1255656659. The next prime is 1255656673. The reversal of 1255656664 is 4666565521.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366849 + ... + 370255.

It is an arithmetic number, because the mean of its divisors is an integer number (76833360).

Almost surely, 2^1255656664 is an apocalyptic number.

It is an amenable number.

1255656664 is a deficient number, since it is larger than the sum of its proper divisors (1203010856).

1255656664 is a wasteful number, since it uses less digits than its factorization.

1255656664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5439 (or 5435 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 46.

The square root of 1255656664 is about 35435.2460694151. The cubic root of 1255656664 is about 1078.8398218102.

The spelling of 1255656664 in words is "one billion, two hundred fifty-five million, six hundred fifty-six thousand, six hundred sixty-four".