991160530771522 has 4 divisors (see below), whose sum is σ = 1486740796157286. Its totient is φ = 495580265385760.

The previous prime is 991160530771519. The next prime is 991160530771577. The reversal of 991160530771522 is 225177035061199.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 645016701158041 + 346143829613481 = 25397179^2 + 18604941^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247790132692879 + ... + 247790132692882.

Almost surely, 2^{991160530771522} is an apocalyptic number.

991160530771522 is a deficient number, since it is larger than the sum of its proper divisors (495580265385764).

991160530771522 is a wasteful number, since it uses less digits than its factorization.

991160530771522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495580265385763.

The product of its (nonzero) digits is 7144200, while the sum is 58.

The spelling of 991160530771522 in words is "nine hundred ninety-one trillion, one hundred sixty billion, five hundred thirty million, seven hundred seventy-one thousand, five hundred twenty-two".