3728561855 has 16 divisors (see below), whose sum is σ = 4672831680. Its totient is φ = 2850701568.

The previous prime is 3728561833. The next prime is 3728561861. The reversal of 3728561855 is 5581658273.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3728561855 is a prime.

It is a super-2 number, since 2×3728561855² = 27804347013122082050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126131 + ... + 152859.

It is an arithmetic number, because the mean of its divisors is an integer number (292051980).

Almost surely, 2^3728561855 is an apocalyptic number.

3728561855 is a deficient number, since it is larger than the sum of its proper divisors (944269825).

3728561855 is a wasteful number, since it uses less digits than its factorization.

3728561855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27970.

The product of its digits is 2016000, while the sum is 50.

The square root of 3728561855 is about 61061.9509596606. The cubic root of 3728561855 is about 1550.6500020933.

The spelling of 3728561855 in words is "three billion, seven hundred twenty-eight million, five hundred sixty-one thousand, eight hundred fifty-five".