215640246326015 has 16 divisors (see below), whose sum is σ = 296480119904832. Its totient is φ = 147495135009024.

The previous prime is 215640246325981. The next prime is 215640246326017. The reversal of 215640246326015 is 510623642046512.

It is a cyclic number.

It is not a de Polignac number, because 215640246326015 - 2⁸ = 215640246325759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215640246326017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7759620734 + ... + 7759648523.

It is an arithmetic number, because the mean of its divisors is an integer number (18530007494052).

Almost surely, 2^{215640246326015} is an apocalyptic number.

215640246326015 is a deficient number, since it is larger than the sum of its proper divisors (80839873578817).

215640246326015 is a wasteful number, since it uses less digits than its factorization.

215640246326015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15519269666.

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 215640246326015 in words is "two hundred fifteen trillion, six hundred forty billion, two hundred forty-six million, three hundred twenty-six thousand, fifteen".