3856567642 has 12 divisors (see below), whose sum is σ = 6047303850. Its totient is φ = 1844444888.

The previous prime is 3856567607. The next prime is 3856567661. The reversal of 3856567642 is 2467656583.

It can be written as a sum of positive squares in only one way, i.e., 3808000681 + 48566961 = 61709^2 + 6969^2 .

It is a super-2 number, since 2×3856567642² = 29746227954642880328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3856567642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1821517 + ... + 1823632.

Almost surely, 2^3856567642 is an apocalyptic number.

3856567642 is a deficient number, since it is larger than the sum of its proper divisors (2190736208).

3856567642 is a wasteful number, since it uses less digits than its factorization.

3856567642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645197 (or 3645174 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 52.

The square root of 3856567642 is about 62101.2692462884. The cubic root of 3856567642 is about 1568.1959130316.

The spelling of 3856567642 in words is "three billion, eight hundred fifty-six million, five hundred sixty-seven thousand, six hundred forty-two".