7253128648 has 32 divisors (see below), whose sum is σ = 13979379960. Its totient is φ = 3525465600.

The previous prime is 7253128601. The next prime is 7253128661. The reversal of 7253128648 is 8468213527.

It can be written as a sum of positive squares in 4 ways, for example, as 3203333604 + 4049795044 = 56598^2 + 63638^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7253128598 and 7253128607.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348948 + ... + 369148.

Almost surely, 2^7253128648 is an apocalyptic number.

It is an amenable number.

7253128648 is a deficient number, since it is larger than the sum of its proper divisors (6726251312).

7253128648 is a wasteful number, since it uses less digits than its factorization.

7253128648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21457 (or 21453 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The square root of 7253128648 is about 85165.3019016548. The cubic root of 7253128648 is about 1935.7166851143.

The spelling of 7253128648 in words is "seven billion, two hundred fifty-three million, one hundred twenty-eight thousand, six hundred forty-eight".