21613312775541 has 8 divisors (see below), whose sum is σ = 28820255651200. Its totient is φ = 14407622541792.

The previous prime is 21613312775491. The next prime is 21613312775591. The reversal of 21613312775541 is 14557721331612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21613312775491) and next prime (21613312775591).

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

It is not a de Polignac number, because 21613312775541 - 2¹³ = 21613312767349 is a prime.

It is a super-3 number, since 3×21613312775541³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21613312775591) 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, 313120216 + ... + 313189233.

It is an arithmetic number, because the mean of its divisors is an integer number (3602531956400).

Almost surely, 2^{21613312775541} is an apocalyptic number.

It is an amenable number.

21613312775541 is a deficient number, since it is larger than the sum of its proper divisors (7206942875659).

21613312775541 is a wasteful number, since it uses less digits than its factorization.

21613312775541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626320955.

The product of its digits is 1058400, while the sum is 48.

The spelling of 21613312775541 in words is "twenty-one trillion, six hundred thirteen billion, three hundred twelve million, seven hundred seventy-five thousand, five hundred forty-one".