2151611564611 has 4 divisors (see below), whose sum is σ = 2156403573000. Its totient is φ = 2146819556224.

The previous prime is 2151611564593. The next prime is 2151611564647. The reversal of 2151611564611 is 1164651161512.

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

It is a cyclic number.

It is not a de Polignac number, because 2151611564611 - 2¹⁵ = 2151611531843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151611544611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2396003521 + ... + 2396004418.

It is an arithmetic number, because the mean of its divisors is an integer number (539100893250).

Almost surely, 2^{2151611564611} is an apocalyptic number.

2151611564611 is a deficient number, since it is larger than the sum of its proper divisors (4792008389).

2151611564611 is an equidigital number, since it uses as much as digits as its factorization.

2151611564611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4792008388.

The product of its digits is 43200, while the sum is 40.

The spelling of 2151611564611 in words is "two trillion, one hundred fifty-one billion, six hundred eleven million, five hundred sixty-four thousand, six hundred eleven".