7481582138 has 16 divisors (see below), whose sum is σ = 11268661056. Its totient is φ = 3725377920.

The previous prime is 7481582123. The next prime is 7481582167. The reversal of 7481582138 is 8312851847.

It is a junction number, because it is equal to n+sod(n) for n = 7481582092 and 7481582101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1414058 + ... + 1419338.

It is an arithmetic number, because the mean of its divisors is an integer number (704291316).

Almost surely, 2^7481582138 is an apocalyptic number.

7481582138 is a deficient number, since it is larger than the sum of its proper divisors (3787078918).

7481582138 is a wasteful number, since it uses less digits than its factorization.

7481582138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8069.

The product of its digits is 430080, while the sum is 47.

The square root of 7481582138 is about 86496.1394398617. The cubic root of 7481582138 is about 1955.8302073735.

The spelling of 7481582138 in words is "seven billion, four hundred eighty-one million, five hundred eighty-two thousand, one hundred thirty-eight".