3861503613 has 36 divisors (see below), whose sum is σ = 6342352380. Its totient is φ = 2259586560.

The previous prime is 3861503579. The next prime is 3861503629. The reversal of 3861503613 is 3163051683.

It is a happy number.

3861503613 is a `hidden beast` number, since 3 + 8 + 615 + 0 + 36 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2715139449 + 1146364164 = 52107^2 + 33858^2 .

It is not a de Polignac number, because 3861503613 - 2⁹ = 3861503101 is a prime.

It is a super-2 number, since 2×3861503613² = 29822420306424107538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861503683) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 29556 + ... + 92717.

It is an arithmetic number, because the mean of its divisors is an integer number (176176455).

Almost surely, 2^3861503613 is an apocalyptic number.

3861503613 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

3861503613 is a deficient number, since it is larger than the sum of its proper divisors (2480848767).

3861503613 is a wasteful number, since it uses less digits than its factorization.

3861503613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122330 (or 122316 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 3861503613 is about 62140.9978436137. The cubic root of 3861503613 is about 1568.8646656861.

The spelling of 3861503613 in words is "three billion, eight hundred sixty-one million, five hundred three thousand, six hundred thirteen".