5121663420 has 192 divisors, whose sum is σ = 15050448000. Its totient is φ = 1300316160.

The previous prime is 5121663413. The next prime is 5121663433. The reversal of 5121663420 is 243661215.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32621982 + ... + 32622138.

It is an arithmetic number, because the mean of its divisors is an integer number (78387750).

Almost surely, 2^5121663420 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 5121663420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7525224000).

5121663420 is an abundant number, since it is smaller than the sum of its proper divisors (9928784580).

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

5121663420 is a wasteful number, since it uses less digits than its factorization.

5121663420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 5121663420 is about 71565.7978366761. The cubic root of 5121663420 is about 1723.7343844068.

The spelling of 5121663420 in words is "five billion, one hundred twenty-one million, six hundred sixty-three thousand, four hundred twenty".