14481901991 has 2 divisors, whose sum is σ = 14481901992. Its totient is φ = 14481901990.

The previous prime is 14481901939. The next prime is 14481902027. The reversal of 14481901991 is 19910918441.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 14481901991 - 2¹⁰ = 14481900967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14481901901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7240950995 + 7240950996.

It is an arithmetic number, because the mean of its divisors is an integer number (7240950996).

Almost surely, 2^14481901991 is an apocalyptic number.

14481901991 is a deficient number, since it is larger than the sum of its proper divisors (1).

14481901991 is an equidigital number, since it uses as much as digits as its factorization.

14481901991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 47.

The spelling of 14481901991 in words is "fourteen billion, four hundred eighty-one million, nine hundred one thousand, nine hundred ninety-one".