3862978561 has 16 divisors (see below), whose sum is σ = 4407346944. Its totient is φ = 3354165504.

The previous prime is 3862978529. The next prime is 3862978571. The reversal of 3862978561 is 1658792683.

It is a cyclic number.

It is not a de Polignac number, because 3862978561 - 2⁵ = 3862978529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3862978571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501606 + ... + 509248.

It is an arithmetic number, because the mean of its divisors is an integer number (275459184).

Almost surely, 2^3862978561 is an apocalyptic number.

It is an amenable number.

3862978561 is a deficient number, since it is larger than the sum of its proper divisors (544368383).

3862978561 is a wasteful number, since it uses less digits than its factorization.

3862978561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9960.

The product of its digits is 4354560, while the sum is 55.

The square root of 3862978561 is about 62152.8644633536. The cubic root of 3862978561 is about 1569.0643892028.

The spelling of 3862978561 in words is "three billion, eight hundred sixty-two million, nine hundred seventy-eight thousand, five hundred sixty-one".