7811138610 has 160 divisors (see below), whose sum is σ = 23004907200. Its totient is φ = 1885991040.

The previous prime is 7811138593. The next prime is 7811138611. The reversal of 7811138610 is 168311187.

It is a happy number.

7811138610 is a `hidden beast` number, since 7 + 8 + 1 + 1 + 1 + 38 + 610 = 666.

It is a super-2 number, since 2×7811138610² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7811138611) by changing a digit.

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, 2395161 + ... + 2398419.

It is an arithmetic number, because the mean of its divisors is an integer number (143780670).

Almost surely, 2^7811138610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7811138610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11502453600).

7811138610 is an abundant number, since it is smaller than the sum of its proper divisors (15193768590).

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

7811138610 is a wasteful number, since it uses less digits than its factorization.

7811138610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3558 (or 3549 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 7811138610 is about 88380.6461279844. The cubic root of 7811138610 is about 1984.1360510958.

Adding to 7811138610 its reverse (168311187), we get a palindrome (7979449797).

The spelling of 7811138610 in words is "seven billion, eight hundred eleven million, one hundred thirty-eight thousand, six hundred ten".