3877954561 has 8 divisors (see below), whose sum is σ = 4219314344. Its totient is φ = 3542745600.

The previous prime is 3877954529. The next prime is 3877954567. The reversal of 3877954561 is 1654597783.

It can be written as a sum of positive squares in 4 ways, for example, as 780364225 + 3097590336 = 27935^2 + 55656^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3877954561 - 2⁵ = 3877954529 is a prime.

It is a super-4 number, since 4×3877954561⁴ (a number of 39 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3877954567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1536390 + ... + 1538911.

It is an arithmetic number, because the mean of its divisors is an integer number (527414293).

Almost surely, 2^3877954561 is an apocalyptic number.

It is an amenable number.

3877954561 is a deficient number, since it is larger than the sum of its proper divisors (341359783).

3877954561 is a wasteful number, since it uses less digits than its factorization.

3877954561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3075411.

The product of its digits is 6350400, while the sum is 55.

The square root of 3877954561 is about 62273.2250730601. The cubic root of 3877954561 is about 1571.0894248124.

The spelling of 3877954561 in words is "three billion, eight hundred seventy-seven million, nine hundred fifty-four thousand, five hundred sixty-one".