11896650991 has 2 divisors, whose sum is σ = 11896650992. Its totient is φ = 11896650990.

The previous prime is 11896650971. The next prime is 11896651057. The reversal of 11896650991 is 19905669811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11896650991 - 2¹⁷ = 11896519919 is a prime.

It is a super-2 number, since 2×11896650991² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11896650971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5948325495 + 5948325496.

It is an arithmetic number, because the mean of its divisors is an integer number (5948325496).

Almost surely, 2^11896650991 is an apocalyptic number.

11896650991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11896650991 is an equidigital number, since it uses as much as digits as its factorization.

11896650991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 55.

The spelling of 11896650991 in words is "eleven billion, eight hundred ninety-six million, six hundred fifty thousand, nine hundred ninety-one".