7228155665156 has 12 divisors (see below), whose sum is σ = 12657173282460. Its totient is φ = 3611820441600.

The previous prime is 7228155665141. The next prime is 7228155665167. The reversal of 7228155665156 is 6515665518227.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5572857276100 + 1655298389056 = 2360690^2 + 1286584^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7228155665095 and 7228155665104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564340541 + ... + 564353348.

It is an arithmetic number, because the mean of its divisors is an integer number (1054764440205).

Almost surely, 2^{7228155665156} is an apocalyptic number.

It is an amenable number.

7228155665156 is a deficient number, since it is larger than the sum of its proper divisors (5429017617304).

7228155665156 is a wasteful number, since it uses less digits than its factorization.

7228155665156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128695494 (or 1128695492 counting only the distinct ones).

The product of its digits is 30240000, while the sum is 59.

The spelling of 7228155665156 in words is "seven trillion, two hundred twenty-eight billion, one hundred fifty-five million, six hundred sixty-five thousand, one hundred fifty-six".