27777472345 has 32 divisors (see below), whose sum is σ = 39364208640. Its totient is φ = 18413982720.

The previous prime is 27777472343. The next prime is 27777472357. The reversal of 27777472345 is 54327477772.

It is a happy number.

It is not a de Polignac number, because 27777472345 - 2¹ = 27777472343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27777472343) 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, 1082079 + ... + 1107451.

It is an arithmetic number, because the mean of its divisors is an integer number (1230131520).

Almost surely, 2^27777472345 is an apocalyptic number.

It is an amenable number.

27777472345 is a deficient number, since it is larger than the sum of its proper divisors (11586736295).

27777472345 is a wasteful number, since it uses less digits than its factorization.

27777472345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26425.

The product of its digits is 16134720, while the sum is 55.

The spelling of 27777472345 in words is "twenty-seven billion, seven hundred seventy-seven million, four hundred seventy-two thousand, three hundred forty-five".