5131868994 has 192 divisors, whose sum is σ = 13744926720. Its totient is φ = 1389648960.

The previous prime is 5131868977. The next prime is 5131869023. The reversal of 5131868994 is 4998681315.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 5131868994.

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, 24321549 + ... + 24321759.

It is an arithmetic number, because the mean of its divisors is an integer number (71588160).

Almost surely, 2^5131868994 is an apocalyptic number.

5131868994 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5131868994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6872463360).

5131868994 is an abundant number, since it is smaller than the sum of its proper divisors (8613057726).

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

5131868994 is a wasteful number, since it uses less digits than its factorization.

5131868994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 307 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 5131868994 is about 71637.0643870895. The cubic root of 5131868994 is about 1724.8785457021.

The spelling of 5131868994 in words is "five billion, one hundred thirty-one million, eight hundred sixty-eight thousand, nine hundred ninety-four".