1099991612519 has 2 divisors, whose sum is σ = 1099991612520.
Its totient is φ = 1099991612518.
The previous prime is 1099991612477. The next prime is 1099991612539. The reversal of 1099991612519 is 9152161999901.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 1099991612519 - 224 = 1099974835303 is a prime.
It is a super-2 number, since 2×10999916125192 (a number of 25 digits) contains 22 as substring.
It is a Sophie Germain prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1099991612539) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549995806259 + 549995806260.
It is an arithmetic number, because the mean of its divisors is an integer number (549995806260).
Almost surely, 21099991612519 is an apocalyptic number.
1099991612519 is a deficient number, since it is larger than the sum of its proper divisors (1).
1099991612519 is an equidigital number, since it uses as much as digits as its factorization.
1099991612519 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 3542940, while the sum is 62.
The spelling of 1099991612519 in words is "one trillion, ninety-nine billion, nine hundred ninety-one million, six hundred twelve thousand, five hundred nineteen".