3881125557 has 8 divisors (see below), whose sum is σ = 5749815680. Its totient is φ = 2587417020.

The previous prime is 3881125537. The next prime is 3881125571. The reversal of 3881125557 is 7555211883.

3881125557 is a `hidden beast` number, since 3 + 8 + 81 + 12 + 5 + 557 = 666.

It is not a de Polignac number, because 3881125557 - 2⁷ = 3881125429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3881125537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71872669 + ... + 71872722.

It is an arithmetic number, because the mean of its divisors is an integer number (718726960).

Almost surely, 2^3881125557 is an apocalyptic number.

It is an amenable number.

3881125557 is a deficient number, since it is larger than the sum of its proper divisors (1868690123).

3881125557 is a wasteful number, since it uses less digits than its factorization.

3881125557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143745400 (or 143745394 counting only the distinct ones).

The product of its digits is 336000, while the sum is 45.

The square root of 3881125557 is about 62298.6802187655. The cubic root of 3881125557 is about 1571.5175337479.

The spelling of 3881125557 in words is "three billion, eight hundred eighty-one million, one hundred twenty-five thousand, five hundred fifty-seven".