1522720351161 has 10 divisors (see below), whose sum is σ = 2274681018522. Its totient is φ = 1015146900720.

The previous prime is 1522720351147. The next prime is 1522720351183. The reversal of 1522720351161 is 1611530272251.

1522720351161 is a `hidden beast` number, since 1 + 5 + 227 + 20 + 351 + 1 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 858078005625 + 664642345536 = 926325^2 + 815256^2 .

It is not a de Polignac number, because 1522720351161 - 2⁹ = 1522720350649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1522720350161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9399508260 + ... + 9399508421.

Almost surely, 2^{1522720351161} is an apocalyptic number.

It is an amenable number.

1522720351161 is a deficient number, since it is larger than the sum of its proper divisors (751960667361).

1522720351161 is an equidigital number, since it uses as much as digits as its factorization.

1522720351161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18799016693 (or 18799016684 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 1522720351161 in words is "one trillion, five hundred twenty-two billion, seven hundred twenty million, three hundred fifty-one thousand, one hundred sixty-one".