7545454521 has 16 divisors (see below), whose sum is σ = 10981447680. Its totient is φ = 4570402320.

The previous prime is 7545454517. The next prime is 7545454531. The reversal of 7545454521 is 1254545457.

7545454521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7545454521 - 2² = 7545454517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7545454531) 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, 5281 + ... + 122958.

It is an arithmetic number, because the mean of its divisors is an integer number (686340480).

Almost surely, 2^7545454521 is an apocalyptic number.

It is an amenable number.

7545454521 is a deficient number, since it is larger than the sum of its proper divisors (3435993159).

7545454521 is a wasteful number, since it uses less digits than its factorization.

7545454521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130036.

The product of its digits is 560000, while the sum is 42.

The square root of 7545454521 is about 86864.5757544466. The cubic root of 7545454521 is about 1961.3802683035.

Adding to 7545454521 its reverse (1254545457), we get a palindrome (8799999978).

The spelling of 7545454521 in words is "seven billion, five hundred forty-five million, four hundred fifty-four thousand, five hundred twenty-one".