1256052656 has 10 divisors (see below), whose sum is σ = 2433602052. Its totient is φ = 628026320.

The previous prime is 1256052649. The next prime is 1256052659. The reversal of 1256052656 is 6562506521.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1256052659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39251630 + ... + 39251661.

Almost surely, 2^1256052656 is an apocalyptic number.

1256052656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1256052656 is a deficient number, since it is larger than the sum of its proper divisors (1177549396).

1256052656 is an equidigital number, since it uses as much as digits as its factorization.

1256052656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78503299 (or 78503293 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 1256052656 is about 35440.8331730505. The cubic root of 1256052656 is about 1078.9532198563.

The spelling of 1256052656 in words is "one billion, two hundred fifty-six million, fifty-two thousand, six hundred fifty-six".