7628444657 has 2 divisors, whose sum is σ = 7628444658. Its totient is φ = 7628444656.

The previous prime is 7628444647. The next prime is 7628444669. The reversal of 7628444657 is 7564448267.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7617972961 + 10471696 = 87281^2 + 3236^2 .

It is a cyclic number.

It is not a de Polignac number, because 7628444657 - 2²² = 7624250353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7628444599 and 7628444608.

It is not a weakly prime, because it can be changed into another prime (7628444647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3814222328 + 3814222329.

It is an arithmetic number, because the mean of its divisors is an integer number (3814222329).

Almost surely, 2^7628444657 is an apocalyptic number.

It is an amenable number.

7628444657 is a deficient number, since it is larger than the sum of its proper divisors (1).

7628444657 is an equidigital number, since it uses as much as digits as its factorization.

7628444657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9031680, while the sum is 53.

The square root of 7628444657 is about 87340.9678043471. The cubic root of 7628444657 is about 1968.5449378059.

The spelling of 7628444657 in words is "seven billion, six hundred twenty-eight million, four hundred forty-four thousand, six hundred fifty-seven".