27665310780623 has 12 divisors (see below), whose sum is σ = 28433833321320. Its totient is φ = 26917028795232.

The previous prime is 27665310780599. The next prime is 27665310780643. The reversal of 27665310780623 is 32608701356672.

It is not a de Polignac number, because 27665310780623 - 2¹⁶ = 27665310715087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27665310780643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73655165 + ... + 74029817.

It is an arithmetic number, because the mean of its divisors is an integer number (2369486110110).

Almost surely, 2^{27665310780623} is an apocalyptic number.

27665310780623 is a deficient number, since it is larger than the sum of its proper divisors (768522540697).

27665310780623 is an equidigital number, since it uses as much as digits as its factorization.

27665310780623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428666 (or 428629 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 56.

The spelling of 27665310780623 in words is "twenty-seven trillion, six hundred sixty-five billion, three hundred ten million, seven hundred eighty thousand, six hundred twenty-three".