7773306081256 has 8 divisors (see below), whose sum is σ = 14574948902370. Its totient is φ = 3886653040624.

The previous prime is 7773306081251. The next prime is 7773306081257. The reversal of 7773306081256 is 6521806033777.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3908268040356 + 3865038040900 = 1976934^2 + 1965970^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×7773306081256² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 7773306081197 and 7773306081206.

It is not an unprimeable number, because it can be changed into a prime (7773306081251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485831630071 + ... + 485831630086.

Almost surely, 2^{7773306081256} is an apocalyptic number.

It is an amenable number.

7773306081256 is a deficient number, since it is larger than the sum of its proper divisors (6801642821114).

7773306081256 is a wasteful number, since it uses less digits than its factorization.

7773306081256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971663260163 (or 971663260159 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 55.

It can be divided in two parts, 777330 and 6081256, that added together give a palindrome (6858586).

The spelling of 7773306081256 in words is "seven trillion, seven hundred seventy-three billion, three hundred six million, eighty-one thousand, two hundred fifty-six".