5121612621 has 48 divisors (see below), whose sum is σ = 8087264640. Its totient is φ = 3112266240.

The previous prime is 5121612527. The next prime is 5121612623. The reversal of 5121612621 is 1262161215.

5121612621 is a `hidden beast` number, since 5 + 1 + 21 + 6 + 12 + 621 = 666.

It is not a de Polignac number, because 5121612621 - 2⁹ = 5121612109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5121612623) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 506800 + ... + 516806.

It is an arithmetic number, because the mean of its divisors is an integer number (168484680).

Almost surely, 2^5121612621 is an apocalyptic number.

It is an amenable number.

5121612621 is a deficient number, since it is larger than the sum of its proper divisors (2965652019).

5121612621 is a wasteful number, since it uses less digits than its factorization.

5121612621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10146 (or 10143 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 5121612621 is about 71565.4429246407. The cubic root of 5121612621 is about 1723.7286854593.

Adding to 5121612621 its reverse (1262161215), we get a palindrome (6383773836).

The spelling of 5121612621 in words is "five billion, one hundred twenty-one million, six hundred twelve thousand, six hundred twenty-one".