11505000654991 has 2 divisors, whose sum is σ = 11505000654992. Its totient is φ = 11505000654990.

The previous prime is 11505000654989. The next prime is 11505000655039. The reversal of 11505000654991 is 19945600050511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11505000654991 - 2¹ = 11505000654989 is a prime.

Together with 11505000654989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11505000654691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5752500327495 + 5752500327496.

It is an arithmetic number, because the mean of its divisors is an integer number (5752500327496).

Almost surely, 2^{11505000654991} is an apocalyptic number.

11505000654991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11505000654991 is an equidigital number, since it uses as much as digits as its factorization.

11505000654991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243000, while the sum is 46.

The spelling of 11505000654991 in words is "eleven trillion, five hundred five billion, six hundred fifty-four thousand, nine hundred ninety-one".