7123528641 has 32 divisors (see below), whose sum is σ = 9896656896. Its totient is φ = 4554000000.

The previous prime is 7123528639. The next prime is 7123528669. The reversal of 7123528641 is 1468253217.

It is not a de Polignac number, because 7123528641 - 2¹ = 7123528639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7123528641.

It is not an unprimeable number, because it can be changed into a prime (7123528681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6188416 + ... + 6189566.

It is an arithmetic number, because the mean of its divisors is an integer number (309270528).

Almost surely, 2^7123528641 is an apocalyptic number.

It is an amenable number.

7123528641 is a deficient number, since it is larger than the sum of its proper divisors (2773128255).

7123528641 is a wasteful number, since it uses less digits than its factorization.

7123528641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013.

The product of its digits is 80640, while the sum is 39.

The square root of 7123528641 is about 84400.9990521439. Note that the first 3 decimals coincide. The cubic root of 7123528641 is about 1924.1180997529.

The spelling of 7123528641 in words is "seven billion, one hundred twenty-three million, five hundred twenty-eight thousand, six hundred forty-one".