5121555560 has 64 divisors (see below), whose sum is σ = 12618115200. Its totient is φ = 1855417600.

The previous prime is 5121555511. The next prime is 5121555563. The reversal of 5121555560 is 655551215.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 5121555560.

It is not an unprimeable number, because it can be changed into a prime (5121555563) 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, 96725 + ... + 139995.

It is an arithmetic number, because the mean of its divisors is an integer number (197158050).

Almost surely, 2^5121555560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5121555560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6309057600).

5121555560 is an abundant number, since it is smaller than the sum of its proper divisors (7496559640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5121555560 is a wasteful number, since it uses less digits than its factorization.

5121555560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43562 (or 43558 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 35.

The square root of 5121555560 is about 71565.0442604488. The cubic root of 5121555560 is about 1723.7222839568.

It can be divided in two parts, 512155 and 5560, that added together give a palindrome (517715).

The spelling of 5121555560 in words is "five billion, one hundred twenty-one million, five hundred fifty-five thousand, five hundred sixty".