5111291808 has 480 divisors, whose sum is σ = 18520596864. Its totient is φ = 1349664768.

The previous prime is 5111291743. The next prime is 5111291819. The reversal of 5111291808 is 8081921115.

5111291808 is a `hidden beast` number, since 511 + 129 + 18 + 0 + 8 = 666.

It is a super-2 number, since 2×5111291808² = 52250607893055817728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 22516591 + ... + 22516817.

Almost surely, 2^5111291808 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 5111291808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9260298432).

5111291808 is an abundant number, since it is smaller than the sum of its proper divisors (13409305056).

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

5111291808 is a wasteful number, since it uses less digits than its factorization.

5111291808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 36.

The square root of 5111291808 is about 71493.2990426376. The cubic root of 5111291808 is about 1722.5700500735.

The spelling of 5111291808 in words is "five billion, one hundred eleven million, two hundred ninety-one thousand, eight hundred eight".