3551861872 has 40 divisors (see below), whose sum is σ = 7424368560. Its totient is φ = 1636385280.

The previous prime is 3551861839. The next prime is 3551861893. The reversal of 3551861872 is 2781681553.

3551861872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103347 + ... + 133357.

It is an arithmetic number, because the mean of its divisors is an integer number (185609214).

Almost surely, 2^3551861872 is an apocalyptic number.

It is an amenable number.

3551861872 is an abundant number, since it is smaller than the sum of its proper divisors (3872506688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3551861872 is a wasteful number, since it uses less digits than its factorization.

3551861872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30601 (or 30595 counting only the distinct ones).

The product of its digits is 403200, while the sum is 46.

The square root of 3551861872 is about 59597.4988736944. The cubic root of 3551861872 is about 1525.7569470907.

The spelling of 3551861872 in words is "three billion, five hundred fifty-one million, eight hundred sixty-one thousand, eight hundred seventy-two".