27405367381 has 8 divisors (see below), whose sum is σ = 31986812160. Its totient is φ = 22990520688.

The previous prime is 27405367373. The next prime is 27405367391. The reversal of 27405367381 is 18376350472.

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 27405367381 - 2³ = 27405367373 is a prime.

It is a super-2 number, since 2×27405367381² (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 (27405367391) 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, 41649166 + ... + 41649823.

It is an arithmetic number, because the mean of its divisors is an integer number (3998351520).

Almost surely, 2^27405367381 is an apocalyptic number.

It is an amenable number.

27405367381 is a deficient number, since it is larger than the sum of its proper divisors (4581444779).

27405367381 is an equidigital number, since it uses as much as digits as its factorization.

27405367381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83299043.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 27405367381 in words is "twenty-seven billion, four hundred five million, three hundred sixty-seven thousand, three hundred eighty-one".