27739670945 has 32 divisors (see below), whose sum is σ = 39473940480. Its totient is φ = 18312376320.

The previous prime is 27739670921. The next prime is 27739670947. The reversal of 27739670945 is 54907693772.

It is not a de Polignac number, because 27739670945 - 2¹² = 27739666849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27739670947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143171 + ... + 275639.

It is an arithmetic number, because the mean of its divisors is an integer number (1233560640).

Almost surely, 2^27739670945 is an apocalyptic number.

It is an amenable number.

27739670945 is a deficient number, since it is larger than the sum of its proper divisors (11734269535).

27739670945 is a wasteful number, since it uses less digits than its factorization.

27739670945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132705.

The product of its (nonzero) digits is 20003760, while the sum is 59.

The spelling of 27739670945 in words is "twenty-seven billion, seven hundred thirty-nine million, six hundred seventy thousand, nine hundred forty-five".