27277931648 has 32 divisors (see below), whose sum is σ = 59283007920. Its totient is φ = 12399059200.

The previous prime is 27277931641. The next prime is 27277931663. The reversal of 27277931648 is 84613977272.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 27277931593 and 27277931602.

It is not an unprimeable number, because it can be changed into a prime (27277931641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9685358 + ... + 9688173.

Almost surely, 2^27277931648 is an apocalyptic number.

It is an amenable number.

27277931648 is an abundant number, since it is smaller than the sum of its proper divisors (32005076272).

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

27277931648 is a wasteful number, since it uses less digits than its factorization.

27277931648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19373556 (or 19373544 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 56.

The spelling of 27277931648 in words is "twenty-seven billion, two hundred seventy-seven million, nine hundred thirty-one thousand, six hundred forty-eight".