215261560611 has 10 divisors (see below), whose sum is σ = 321563565972. Its totient is φ = 143507707020.

The previous prime is 215261560609. The next prime is 215261560621. The reversal of 215261560611 is 116065162512.

215261560611 is a `hidden beast` number, since 2 + 1 + 5 + 26 + 15 + 6 + 0 + 611 = 666.

It is not a de Polignac number, because 215261560611 - 2¹ = 215261560609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215261560621) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1328774985 + ... + 1328775146.

Almost surely, 2^215261560611 is an apocalyptic number.

215261560611 is a deficient number, since it is larger than the sum of its proper divisors (106302005361).

215261560611 is an equidigital number, since it uses as much as digits as its factorization.

215261560611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657550143 (or 2657550134 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The spelling of 215261560611 in words is "two hundred fifteen billion, two hundred sixty-one million, five hundred sixty thousand, six hundred eleven".