8138748057 has 16 divisors (see below), whose sum is σ = 11840368320. Its totient is φ = 4931662400.

The previous prime is 8138748049. The next prime is 8138748067. The reversal of 8138748057 is 7508478318.

It is a cyclic number.

It is not a de Polignac number, because 8138748057 - 2³ = 8138748049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8138748067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187207 + ... + 226547.

It is an arithmetic number, because the mean of its divisors is an integer number (740023020).

Almost surely, 2^8138748057 is an apocalyptic number.

It is an amenable number.

8138748057 is a deficient number, since it is larger than the sum of its proper divisors (3701620263).

8138748057 is a wasteful number, since it uses less digits than its factorization.

8138748057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45624.

The product of its (nonzero) digits is 1505280, while the sum is 51.

The square root of 8138748057 is about 90215.0101535216. The cubic root of 8138748057 is about 2011.4961309581.

The spelling of 8138748057 in words is "eight billion, one hundred thirty-eight million, seven hundred forty-eight thousand, fifty-seven".