7527644644 has 81 divisors (see below), whose sum is σ = 14782792521. Its totient is φ = 3352483680.

The previous prime is 7527644603. The next prime is 7527644689. The reversal of 7527644644 is 4464467257.

It is a happy number.

The square root of 7527644644 is 86762.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1113556900 + 6414087744 = 33370^2 + 80088^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 106023129 + ... + 106023199.

Almost surely, 2^7527644644 is an apocalyptic number.

7527644644 is the 86762-nd square number.

It is an amenable number.

7527644644 is a deficient number, since it is larger than the sum of its proper divisors (7255147877).

7527644644 is a wasteful number, since it uses less digits than its factorization.

7527644644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 133 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 49.

The cubic root of 7527644644 is about 1959.8358744285.

Multiplying 7527644644 by its sum of digits (49), we get a square (368854587556 = 607334²).

The spelling of 7527644644 in words is "seven billion, five hundred twenty-seven million, six hundred forty-four thousand, six hundred forty-four".