27485620381 has 4 divisors (see below), whose sum is σ = 28932232000. Its totient is φ = 26039008764.

The previous prime is 27485620363. The next prime is 27485620387. The reversal of 27485620381 is 18302658472.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27485620381 is a prime.

It is a super-2 number, since 2×27485620381² (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 (27485620387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723305781 + ... + 723305818.

It is an arithmetic number, because the mean of its divisors is an integer number (7233058000).

Almost surely, 2^27485620381 is an apocalyptic number.

It is an amenable number.

27485620381 is a deficient number, since it is larger than the sum of its proper divisors (1446611619).

27485620381 is a wasteful number, since it uses less digits than its factorization.

27485620381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446611618.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 27485620381 in words is "twenty-seven billion, four hundred eighty-five million, six hundred twenty thousand, three hundred eighty-one".