6349151491 has 2 divisors, whose sum is σ = 6349151492. Its totient is φ = 6349151490.

The previous prime is 6349151489. The next prime is 6349151531. The reversal of 6349151491 is 1941519436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6349151491 - 2¹ = 6349151489 is a prime.

Together with 6349151489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6349151411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3174575745 + 3174575746.

It is an arithmetic number, because the mean of its divisors is an integer number (3174575746).

Almost surely, 2^6349151491 is an apocalyptic number.

6349151491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6349151491 is an equidigital number, since it uses as much as digits as its factorization.

6349151491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 43.

The square root of 6349151491 is about 79681.5630557032. The cubic root of 6349151491 is about 1851.7054145804.

The spelling of 6349151491 in words is "six billion, three hundred forty-nine million, one hundred fifty-one thousand, four hundred ninety-one".