1255036643656 has 32 divisors (see below), whose sum is σ = 2416883090040. Its totient is φ = 610535743488.

The previous prime is 1255036643587. The next prime is 1255036643671. The reversal of 1255036643656 is 6563466305521.

It can be written as a sum of positive squares in 4 ways, for example, as 1171957804900 + 83078838756 = 1082570^2 + 288234^2 .

It is a super-3 number, since 3×1255036643656³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10184200 + ... + 10306696.

Almost surely, 2^{1255036643656} is an apocalyptic number.

It is an amenable number.

1255036643656 is a deficient number, since it is larger than the sum of its proper divisors (1161846446384).

1255036643656 is a wasteful number, since it uses less digits than its factorization.

1255036643656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157153 (or 157149 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 52.

The spelling of 1255036643656 in words is "one trillion, two hundred fifty-five billion, thirty-six million, six hundred forty-three thousand, six hundred fifty-six".