5191557840 has 480 divisors, whose sum is σ = 20993656320. Its totient is φ = 1175731200.

The previous prime is 5191557827. The next prime is 5191557851. The reversal of 5191557840 is 487551915.

5191557840 is a `hidden beast` number, since 5 + 1 + 91 + 557 + 8 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19156905 + ... + 19157175.

It is an arithmetic number, because the mean of its divisors is an integer number (43736784).

Almost surely, 2^5191557840 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 5191557840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10496828160).

5191557840 is an abundant number, since it is smaller than the sum of its proper divisors (15802098480).

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

5191557840 is a wasteful number, since it uses less digits than its factorization.

5191557840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 45.

The square root of 5191557840 is about 72052.4658842430. The cubic root of 5191557840 is about 1731.5401478365.

The spelling of 5191557840 in words is "five billion, one hundred ninety-one million, five hundred fifty-seven thousand, eight hundred forty".