3651261515 has 12 divisors (see below), whose sum is σ = 4816044912. Its totient is φ = 2655462480.

The previous prime is 3651261503. The next prime is 3651261517. The reversal of 3651261515 is 5151621563.

3651261515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3651261515 - 2¹⁸ = 3650999371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3651261517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3016967 + ... + 3018176.

It is an arithmetic number, because the mean of its divisors is an integer number (401337076).

Almost surely, 2^3651261515 is an apocalyptic number.

3651261515 is a deficient number, since it is larger than the sum of its proper divisors (1164783397).

3651261515 is a wasteful number, since it uses less digits than its factorization.

3651261515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6035170 (or 6035159 counting only the distinct ones).

The product of its digits is 27000, while the sum is 35.

The square root of 3651261515 is about 60425.6693384525. The cubic root of 3651261515 is about 1539.8590857458.

The spelling of 3651261515 in words is "three billion, six hundred fifty-one million, two hundred sixty-one thousand, five hundred fifteen".