1091630479559 has 4 divisors (see below), whose sum is σ = 1091708988504. Its totient is φ = 1091551970616.

The previous prime is 1091630479519. The next prime is 1091630479571. The reversal of 1091630479559 is 9559740361901.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1091630479559 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1091630479498 and 1091630479507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091630479519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39233612 + ... + 39261425.

It is an arithmetic number, because the mean of its divisors is an integer number (272927247126).

Almost surely, 2^{1091630479559} is an apocalyptic number.

1091630479559 is a deficient number, since it is larger than the sum of its proper divisors (78508945).

1091630479559 is an equidigital number, since it uses as much as digits as its factorization.

1091630479559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78508944.

The product of its (nonzero) digits is 9185400, while the sum is 59.

The spelling of 1091630479559 in words is "one trillion, ninety-one billion, six hundred thirty million, four hundred seventy-nine thousand, five hundred fifty-nine".