21136560759 has 12 divisors (see below), whose sum is σ = 30531848256. Its totient is φ = 14090458752.

The previous prime is 21136560667. The next prime is 21136560791. The reversal of 21136560759 is 95706563112.

21136560759 is a `hidden beast` number, since 2 + 1 + 1 + 36 + 5 + 607 + 5 + 9 = 666.

It is not a de Polignac number, because 21136560759 - 2⁸ = 21136560503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21136568759) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399322 + ... + 449144.

It is an arithmetic number, because the mean of its divisors is an integer number (2544320688).

Almost surely, 2^21136560759 is an apocalyptic number.

21136560759 is a deficient number, since it is larger than the sum of its proper divisors (9395287497).

21136560759 is a wasteful number, since it uses less digits than its factorization.

21136560759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96966 (or 96963 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 21136560759 in words is "twenty-one billion, one hundred thirty-six million, five hundred sixty thousand, seven hundred fifty-nine".