7774424991 has 6 divisors (see below), whose sum is σ = 11229725000. Its totient is φ = 5182949988.

The previous prime is 7774424969. The next prime is 7774425007. The reversal of 7774424991 is 1994244777.

It is a happy number.

7774424991 is a `hidden beast` number, since 7 + 77 + 442 + 49 + 91 = 666.

It is not a de Polignac number, because 7774424991 - 2⁶ = 7774424927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7774420991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 431912491 + ... + 431912508.

Almost surely, 2^7774424991 is an apocalyptic number.

7774424991 is a deficient number, since it is larger than the sum of its proper divisors (3455300009).

7774424991 is a wasteful number, since it uses less digits than its factorization.

7774424991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863825005 (or 863825002 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 54.

The square root of 7774424991 is about 88172.6998055521. The cubic root of 7774424991 is about 1981.0225809136.

The spelling of 7774424991 in words is "seven billion, seven hundred seventy-four million, four hundred twenty-four thousand, nine hundred ninety-one".