8106981604 has 6 divisors (see below), whose sum is σ = 14187217814. Its totient is φ = 4053490800.

The previous prime is 8106981559. The next prime is 8106981611. The reversal of 8106981604 is 4061896018.

It can be written as a sum of positive squares in only one way, i.e., 5115110400 + 2991871204 = 71520^2 + 54698^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1013372697 + ... + 1013372704.

Almost surely, 2^8106981604 is an apocalyptic number.

It is an amenable number.

8106981604 is a deficient number, since it is larger than the sum of its proper divisors (6080236210).

8106981604 is a wasteful number, since it uses less digits than its factorization.

8106981604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026745405 (or 2026745403 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 8106981604 is about 90038.7783346709. The cubic root of 8106981604 is about 2008.8756864940.

The spelling of 8106981604 in words is "eight billion, one hundred six million, nine hundred eighty-one thousand, six hundred four".