5261368140 has 216 divisors, whose sum is σ = 18732954240. Its totient is φ = 1191730176.

The previous prime is 5261368127. The next prime is 5261368159. The reversal of 5261368140 is 418631625.

It is a happy number.

5261368140 is a `hidden beast` number, since 526 + 13 + 6 + 81 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 5261368095 and 5261368104.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 994021 + ... + 999299.

It is an arithmetic number, because the mean of its divisors is an integer number (86726640).

Almost surely, 2^5261368140 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 5261368140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9366477120).

5261368140 is an abundant number, since it is smaller than the sum of its proper divisors (13471586100).

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

5261368140 is a wasteful number, since it uses less digits than its factorization.

5261368140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5421 (or 5409 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 5261368140 is about 72535.2889289069. The cubic root of 5261368140 is about 1739.2668929103.

Adding to 5261368140 its reverse (418631625), we get a palindrome (5679999765).

The spelling of 5261368140 in words is "five billion, two hundred sixty-one million, three hundred sixty-eight thousand, one hundred forty".