27321513381 has 8 divisors (see below), whose sum is σ = 40476316160. Its totient is φ = 18214342236.

The previous prime is 27321513299. The next prime is 27321513407. The reversal of 27321513381 is 18331512372.

It is a happy number.

27321513381 is a `hidden beast` number, since 273 + 2 + 1 + 5 + 1 + 3 + 381 = 666.

It is not a de Polignac number, because 27321513381 - 2²⁵ = 27287958949 is a prime.

It is a super-2 number, since 2×27321513381² (a number of 22 digits) contains 22 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 (27321512381) 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, 505953925 + ... + 505953978.

It is an arithmetic number, because the mean of its divisors is an integer number (5059539520).

Almost surely, 2^27321513381 is an apocalyptic number.

It is an amenable number.

27321513381 is a deficient number, since it is larger than the sum of its proper divisors (13154802779).

27321513381 is a wasteful number, since it uses less digits than its factorization.

27321513381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011907912 (or 1011907906 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The spelling of 27321513381 in words is "twenty-seven billion, three hundred twenty-one million, five hundred thirteen thousand, three hundred eighty-one".