7738728064 has 16 divisors (see below), whose sum is σ = 15416997570. Its totient is φ = 3869363968.

The previous prime is 7738728043. The next prime is 7738728079. The reversal of 7738728064 is 4608278377.

It can be written as a sum of positive squares in only one way, i.e., 4625088064 + 3113640000 = 68008^2 + 55800^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30229279 + ... + 30229534.

Almost surely, 2^7738728064 is an apocalyptic number.

It is an amenable number.

7738728064 is a deficient number, since it is larger than the sum of its proper divisors (7678269506).

7738728064 is an equidigital number, since it uses as much as digits as its factorization.

7738728064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60458827 (or 60458815 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 52.

The square root of 7738728064 is about 87970.0407184173. The cubic root of 7738728064 is about 1977.9859177974.

The spelling of 7738728064 in words is "seven billion, seven hundred thirty-eight million, seven hundred twenty-eight thousand, sixty-four".