7938581416 has 48 divisors (see below), whose sum is σ = 15216500700. Its totient is φ = 3882278400.

The previous prime is 7938581407. The next prime is 7938581447. The reversal of 7938581416 is 6141858397.

It can be written as a sum of positive squares in 6 ways, for example, as 7929902500 + 8678916 = 89050^2 + 2946^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7262566 + ... + 7263658.

Almost surely, 2^7938581416 is an apocalyptic number.

It is an amenable number.

7938581416 is a deficient number, since it is larger than the sum of its proper divisors (7277919284).

7938581416 is a wasteful number, since it uses less digits than its factorization.

7938581416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390 (or 1285 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 52.

The square root of 7938581416 is about 89098.7172522702. The cubic root of 7938581416 is about 1994.8686304494.

It can be divided in two parts, 79385 and 81416, that added together give a square (160801 = 401²).

The spelling of 7938581416 in words is "seven billion, nine hundred thirty-eight million, five hundred eighty-one thousand, four hundred sixteen".