7620245521 has 16 divisors (see below), whose sum is σ = 8820056448. Its totient is φ = 6448348800.

The previous prime is 7620245489. The next prime is 7620245531. The reversal of 7620245521 is 1255420267.

It is a cyclic number.

It is not a de Polignac number, because 7620245521 - 2⁵ = 7620245489 is a prime.

It is a super-2 number, since 2×7620245521² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7620245531) 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, 996091 + ... + 1003711.

It is an arithmetic number, because the mean of its divisors is an integer number (551253528).

Almost surely, 2^7620245521 is an apocalyptic number.

It is an amenable number.

7620245521 is a deficient number, since it is larger than the sum of its proper divisors (1199810927).

7620245521 is a wasteful number, since it uses less digits than its factorization.

7620245521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9432.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 7620245521 is about 87294.0176701703. The cubic root of 7620245521 is about 1967.8394137460.

Adding to 7620245521 its reverse (1255420267), we get a palindrome (8875665788).

The spelling of 7620245521 in words is "seven billion, six hundred twenty million, two hundred forty-five thousand, five hundred twenty-one".