27777264738 has 64 divisors (see below), whose sum is σ = 60987924480. Its totient is φ = 8401190400.

The previous prime is 27777264737. The next prime is 27777264763. The reversal of 27777264738 is 83746277772.

It is not an unprimeable number, because it can be changed into a prime (27777264737) 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, 302283 + ... + 383313.

It is an arithmetic number, because the mean of its divisors is an integer number (952936320).

Almost surely, 2^27777264738 is an apocalyptic number.

27777264738 is an abundant number, since it is smaller than the sum of its proper divisors (33210659742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27777264738 is a wasteful number, since it uses less digits than its factorization.

27777264738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81183.

The product of its digits is 38723328, while the sum is 60.

The spelling of 27777264738 in words is "twenty-seven billion, seven hundred seventy-seven million, two hundred sixty-four thousand, seven hundred thirty-eight".