3855540015 has 12 divisors (see below), whose sum is σ = 6682936104. Its totient is φ = 2056287984.

The previous prime is 3855539969. The next prime is 3855540037. The reversal of 3855540015 is 5100455583.

It is a happy number.

3855540015 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3855540015 - 2⁹ = 3855539503 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42839289 + ... + 42839378.

It is an arithmetic number, because the mean of its divisors is an integer number (556911342).

Almost surely, 2^3855540015 is an apocalyptic number.

3855540015 is a deficient number, since it is larger than the sum of its proper divisors (2827396089).

3855540015 is a wasteful number, since it uses less digits than its factorization.

3855540015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85678678 (or 85678675 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The square root of 3855540015 is about 62092.9948947544. The cubic root of 3855540015 is about 1568.0566126857.

Adding to 3855540015 its reverse (5100455583), we get a palindrome (8955995598).

The spelling of 3855540015 in words is "three billion, eight hundred fifty-five million, five hundred forty thousand, fifteen".