7628944521 has 16 divisors (see below), whose sum is σ = 11111820480. Its totient is φ = 4617280320.

The previous prime is 7628944517. The next prime is 7628944541. The reversal of 7628944521 is 1254498267.

It is not a de Polignac number, because 7628944521 - 2² = 7628944517 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7628944541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133506 + ... + 181883.

It is an arithmetic number, because the mean of its divisors is an integer number (694488780).

Almost surely, 2^7628944521 is an apocalyptic number.

It is an amenable number.

7628944521 is a deficient number, since it is larger than the sum of its proper divisors (3482875959).

7628944521 is a wasteful number, since it uses less digits than its factorization.

7628944521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316136.

The product of its digits is 967680, while the sum is 48.

The square root of 7628944521 is about 87343.8293241142. The cubic root of 7628944521 is about 1968.5879340435.

The spelling of 7628944521 in words is "seven billion, six hundred twenty-eight million, nine hundred forty-four thousand, five hundred twenty-one".