7139854868 has 12 divisors (see below), whose sum is σ = 12925599540. Its totient is φ = 3446826432.

The previous prime is 7139854867. The next prime is 7139854901. The reversal of 7139854868 is 8684589317.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1839723664 + 5300131204 = 42892^2 + 72802^2 .

It is a super-2 number, since 2×7139854868² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7139854867) 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 3 ways as a sum of consecutive naturals, for example, 30775121 + ... + 30775352.

It is an arithmetic number, because the mean of its divisors is an integer number (1077133295).

Almost surely, 2^7139854868 is an apocalyptic number.

It is an amenable number.

7139854868 is a deficient number, since it is larger than the sum of its proper divisors (5785744672).

7139854868 is a wasteful number, since it uses less digits than its factorization.

7139854868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61550506 (or 61550504 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 59.

The square root of 7139854868 is about 84497.6619084812. The cubic root of 7139854868 is about 1925.5869233424.

The spelling of 7139854868 in words is "seven billion, one hundred thirty-nine million, eight hundred fifty-four thousand, eight hundred sixty-eight".