3865515135 has 16 divisors (see below), whose sum is σ = 6510341760. Its totient is φ = 1953102240.

The previous prime is 3865515107. The next prime is 3865515139. The reversal of 3865515135 is 5315155683.

It is not a de Polignac number, because 3865515135 - 2⁷ = 3865515007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865515139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6781321 + ... + 6781890.

It is an arithmetic number, because the mean of its divisors is an integer number (406896360).

Almost surely, 2^3865515135 is an apocalyptic number.

3865515135 is a deficient number, since it is larger than the sum of its proper divisors (2644826625).

3865515135 is a wasteful number, since it uses less digits than its factorization.

3865515135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13563238.

The product of its digits is 270000, while the sum is 42.

The square root of 3865515135 is about 62173.2670446069. The cubic root of 3865515135 is about 1569.4077492154.

The spelling of 3865515135 in words is "three billion, eight hundred sixty-five million, five hundred fifteen thousand, one hundred thirty-five".