6355245621 has 32 divisors (see below), whose sum is σ = 8921622528. Its totient is φ = 4016323520.

The previous prime is 6355245601. The next prime is 6355245623. The reversal of 6355245621 is 1265425536.

It is a cyclic number.

It is not a de Polignac number, because 6355245621 - 2³⁰ = 5281503797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6355245621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6355245623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5380651 + ... + 5381831.

It is an arithmetic number, because the mean of its divisors is an integer number (278800704).

Almost surely, 2^6355245621 is an apocalyptic number.

It is an amenable number.

6355245621 is a deficient number, since it is larger than the sum of its proper divisors (2566376907).

6355245621 is a wasteful number, since it uses less digits than its factorization.

6355245621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841.

The product of its digits is 216000, while the sum is 39.

The square root of 6355245621 is about 79719.7944114258. The cubic root of 6355245621 is about 1852.2976682609.

The spelling of 6355245621 in words is "six billion, three hundred fifty-five million, two hundred forty-five thousand, six hundred twenty-one".