21615341711361 has 16 divisors (see below), whose sum is σ = 28870626021888. Its totient is φ = 14385150720000.

The previous prime is 21615341711321. The next prime is 21615341711387. The reversal of 21615341711361 is 16311714351612.

It is a happy number.

It is not a de Polignac number, because 21615341711361 - 2³⁰ = 21614267969537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21615341711321) 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 15 ways as a sum of consecutive naturals, for example, 9674736 + ... + 11697486.

It is an arithmetic number, because the mean of its divisors is an integer number (1804414126368).

Almost surely, 2^{21615341711361} is an apocalyptic number.

It is an amenable number.

21615341711361 is a deficient number, since it is larger than the sum of its proper divisors (7255284310527).

21615341711361 is a wasteful number, since it uses less digits than its factorization.

21615341711361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028952.

The product of its digits is 90720, while the sum is 42.

The spelling of 21615341711361 in words is "twenty-one trillion, six hundred fifteen billion, three hundred forty-one million, seven hundred eleven thousand, three hundred sixty-one".