7748445491 has 2 divisors, whose sum is σ = 7748445492. Its totient is φ = 7748445490.

The previous prime is 7748445479. The next prime is 7748445493. The reversal of 7748445491 is 1945448477.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7748445491 - 2¹⁴ = 7748429107 is a prime.

Together with 7748445493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7748445493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3874222745 + 3874222746.

It is an arithmetic number, because the mean of its divisors is an integer number (3874222746).

Almost surely, 2^7748445491 is an apocalyptic number.

7748445491 is a deficient number, since it is larger than the sum of its proper divisors (1).

7748445491 is an equidigital number, since it uses as much as digits as its factorization.

7748445491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4515840, while the sum is 53.

The square root of 7748445491 is about 88025.2548476856. The cubic root of 7748445491 is about 1978.8134824845.

The spelling of 7748445491 in words is "seven billion, seven hundred forty-eight million, four hundred forty-five thousand, four hundred ninety-one".