5157781420 has 96 divisors (see below), whose sum is σ = 12609031680. Its totient is φ = 1752399360.

The previous prime is 5157781417. The next prime is 5157781451. The reversal of 5157781420 is 241877515.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296689 + ... + 313591.

It is an arithmetic number, because the mean of its divisors is an integer number (131344080).

Almost surely, 2^5157781420 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 5157781420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6304515840).

5157781420 is an abundant number, since it is smaller than the sum of its proper divisors (7451250260).

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

5157781420 is a wasteful number, since it uses less digits than its factorization.

5157781420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17015 (or 17013 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 40.

The square root of 5157781420 is about 71817.6957302307. The cubic root of 5157781420 is about 1727.7768250836.

The spelling of 5157781420 in words is "five billion, one hundred fifty-seven million, seven hundred eighty-one thousand, four hundred twenty".