1191648908517 has 32 divisors (see below), whose sum is σ = 1656191577600. Its totient is φ = 761209602048.

The previous prime is 1191648908479. The next prime is 1191648908519. The reversal of 1191648908517 is 7158098461911.

It is not a de Polignac number, because 1191648908517 - 2⁷ = 1191648908389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191648908519) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 5915508 + ... + 6113634.

It is an arithmetic number, because the mean of its divisors is an integer number (51755986800).

Almost surely, 2^{1191648908517} is an apocalyptic number.

It is an amenable number.

1191648908517 is a deficient number, since it is larger than the sum of its proper divisors (464542669083).

1191648908517 is a wasteful number, since it uses less digits than its factorization.

1191648908517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198685.

The product of its (nonzero) digits is 4354560, while the sum is 60.

The spelling of 1191648908517 in words is "one trillion, one hundred ninety-one billion, six hundred forty-eight million, nine hundred eight thousand, five hundred seventeen".