27777749436 has 36 divisors (see below), whose sum is σ = 70721141400. Its totient is φ = 9192634848.

The previous prime is 27777749431. The next prime is 27777749479. The reversal of 27777749436 is 63494777772.

27777749436 is a `hidden beast` number, since 2 + 7 + 77 + 77 + 494 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×27777749436³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27777749431) 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, 2770551 + ... + 2780558.

It is an arithmetic number, because the mean of its divisors is an integer number (1964476150).

Almost surely, 2^27777749436 is an apocalyptic number.

It is an amenable number.

27777749436 is an abundant number, since it is smaller than the sum of its proper divisors (42943391964).

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

27777749436 is a wasteful number, since it uses less digits than its factorization.

27777749436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551258 (or 5551253 counting only the distinct ones).

The product of its digits is 87127488, while the sum is 63.

The spelling of 27777749436 in words is "twenty-seven billion, seven hundred seventy-seven million, seven hundred forty-nine thousand, four hundred thirty-six".