7938158481 has 48 divisors (see below), whose sum is σ = 12895571520. Its totient is φ = 4664424960.

The previous prime is 7938158477. The next prime is 7938158489. The reversal of 7938158481 is 1848518397.

7938158481 is a `hidden beast` number, since 7 + 9 + 3 + 8 + 158 + 481 = 666.

It is not a de Polignac number, because 7938158481 - 2² = 7938158477 is a prime.

It is a super-2 number, since 2×7938158481² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7938158489) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 417085 + ... + 435701.

It is an arithmetic number, because the mean of its divisors is an integer number (268657740).

Almost surely, 2^7938158481 is an apocalyptic number.

It is an amenable number.

7938158481 is a deficient number, since it is larger than the sum of its proper divisors (4957413039).

7938158481 is a wasteful number, since it uses less digits than its factorization.

7938158481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18766 (or 18763 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The square root of 7938158481 is about 89096.3438138738. The cubic root of 7938158481 is about 1994.8332036856.

The spelling of 7938158481 in words is "seven billion, nine hundred thirty-eight million, one hundred fifty-eight thousand, four hundred eighty-one".