3868566538 has 4 divisors (see below), whose sum is σ = 5802849810. Its totient is φ = 1934283268.

The previous prime is 3868566491. The next prime is 3868566547. The reversal of 3868566538 is 8356658683.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8356658683 = 67 ⋅124726249.

It can be written as a sum of positive squares in only one way, i.e., 2476754289 + 1391812249 = 49767^2 + 37307^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 967141633 + ... + 967141636.

Almost surely, 2^3868566538 is an apocalyptic number.

3868566538 is a deficient number, since it is larger than the sum of its proper divisors (1934283272).

3868566538 is a wasteful number, since it uses less digits than its factorization.

3868566538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934283271.

The product of its digits is 24883200, while the sum is 58.

The square root of 3868566538 is about 62197.8017135654. The cubic root of 3868566538 is about 1569.8205994045.

The spelling of 3868566538 in words is "three billion, eight hundred sixty-eight million, five hundred sixty-six thousand, five hundred thirty-eight".