21613312775377 has 8 divisors (see below), whose sum is σ = 21888334218240. Its totient is φ = 21338327212800.

The previous prime is 21613312775363. The next prime is 21613312775423. The reversal of 21613312775377 is 77357721331612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21613312775377 is a prime.

It is a super-3 number, since 3×21613312775377³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21613312775317) 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, 7756624 + ... + 10168177.

It is an arithmetic number, because the mean of its divisors is an integer number (2736041777280).

Almost surely, 2^{21613312775377} is an apocalyptic number.

It is an amenable number.

21613312775377 is a deficient number, since it is larger than the sum of its proper divisors (275021442863).

21613312775377 is a wasteful number, since it uses less digits than its factorization.

21613312775377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17940143.

The product of its digits is 7779240, while the sum is 55.

The spelling of 21613312775377 in words is "twenty-one trillion, six hundred thirteen billion, three hundred twelve million, seven hundred seventy-five thousand, three hundred seventy-seven".