7522789681 has 32 divisors (see below), whose sum is σ = 8912286720. Its totient is φ = 6276916800.

The previous prime is 7522789667. The next prime is 7522789691. The reversal of 7522789681 is 1869872257.

It is not a de Polignac number, because 7522789681 - 2²⁵ = 7489235249 is a prime.

It is a super-4 number, since 4×7522789681⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7522789621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 849780 + ... + 858586.

It is an arithmetic number, because the mean of its divisors is an integer number (278508960).

Almost surely, 2^7522789681 is an apocalyptic number.

It is an amenable number.

7522789681 is a deficient number, since it is larger than the sum of its proper divisors (1389497039).

7522789681 is a wasteful number, since it uses less digits than its factorization.

7522789681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8965.

The product of its digits is 3386880, while the sum is 55.

The square root of 7522789681 is about 86734.0168618980. The cubic root of 7522789681 is about 1959.4144510221.

The spelling of 7522789681 in words is "seven billion, five hundred twenty-two million, seven hundred eighty-nine thousand, six hundred eighty-one".