7747706649 has 8 divisors (see below), whose sum is σ = 10609472320. Its totient is φ = 5025539376.

The previous prime is 7747706623. The next prime is 7747706657. The reversal of 7747706649 is 9466077477.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7747706649 - 2⁹ = 7747706137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7747706609) 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 in 7 ways as a sum of consecutive naturals, for example, 34899469 + ... + 34899690.

It is an arithmetic number, because the mean of its divisors is an integer number (1326184040).

Almost surely, 2^7747706649 is an apocalyptic number.

It is an amenable number.

7747706649 is a deficient number, since it is larger than the sum of its proper divisors (2861765671).

7747706649 is a wasteful number, since it uses less digits than its factorization.

7747706649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69799199.

The product of its (nonzero) digits is 12446784, while the sum is 57.

The square root of 7747706649 is about 88021.0579861433. The cubic root of 7747706649 is about 1978.7505848369.

The spelling of 7747706649 in words is "seven billion, seven hundred forty-seven million, seven hundred six thousand, six hundred forty-nine".