21875616715 has 8 divisors (see below), whose sum is σ = 26291316960. Its totient is φ = 17473442112.

The previous prime is 21875616713. The next prime is 21875616751. The reversal of 21875616715 is 51761657812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21875616715 - 2¹ = 21875616713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21875616713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3377850 + ... + 3384319.

It is an arithmetic number, because the mean of its divisors is an integer number (3286414620).

Almost surely, 2^21875616715 is an apocalyptic number.

21875616715 is a deficient number, since it is larger than the sum of its proper divisors (4415700245).

21875616715 is an equidigital number, since it uses as much as digits as its factorization.

21875616715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6762821.

The product of its digits is 705600, while the sum is 49.

The spelling of 21875616715 in words is "twenty-one billion, eight hundred seventy-five million, six hundred sixteen thousand, seven hundred fifteen".