7453612521 has 8 divisors (see below), whose sum is σ = 11042388960. Its totient is φ = 4969074996.

The previous prime is 7453612501. The next prime is 7453612531. The reversal of 7453612521 is 1252163547.

7453612521 is a `hidden beast` number, since 7 + 45 + 361 + 252 + 1 = 666.

It is not a de Polignac number, because 7453612521 - 2¹⁷ = 7453481449 is a prime.

It is a super-2 number, since 2×7453612521² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7453612501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138029835 + ... + 138029888.

It is an arithmetic number, because the mean of its divisors is an integer number (1380298620).

Almost surely, 2^7453612521 is an apocalyptic number.

It is an amenable number.

7453612521 is a deficient number, since it is larger than the sum of its proper divisors (3588776439).

7453612521 is a wasteful number, since it uses less digits than its factorization.

7453612521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276059732 (or 276059726 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 7453612521 is about 86334.3067441906. The cubic root of 7453612521 is about 1953.3898976393.

The spelling of 7453612521 in words is "seven billion, four hundred fifty-three million, six hundred twelve thousand, five hundred twenty-one".