215064652613 has 4 divisors (see below), whose sum is σ = 216307801068. Its totient is φ = 213821504160.

The previous prime is 215064652603. The next prime is 215064652651. The reversal of 215064652613 is 316256460512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76946876449 + 138117776164 = 277393^2 + 371642^2 .

It is a cyclic number.

It is not a de Polignac number, because 215064652613 - 2¹⁶ = 215064587077 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 (215064652603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621573968 + ... + 621574313.

It is an arithmetic number, because the mean of its divisors is an integer number (54076950267).

Almost surely, 2^215064652613 is an apocalyptic number.

It is an amenable number.

215064652613 is a deficient number, since it is larger than the sum of its proper divisors (1243148455).

215064652613 is a wasteful number, since it uses less digits than its factorization.

215064652613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243148454.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 215064652613 in words is "two hundred fifteen billion, sixty-four million, six hundred fifty-two thousand, six hundred thirteen".