27977449560 has 64 divisors (see below), whose sum is σ = 86826578400. Its totient is φ = 7203388416.

The previous prime is 27977449547. The next prime is 27977449561. The reversal of 27977449560 is 6594477972.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 27977449494 and 27977449503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27977449561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4016269 + ... + 4023228.

Almost surely, 2^27977449560 is an apocalyptic number.

27977449560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27977449560 is an abundant number, since it is smaller than the sum of its proper divisors (58849128840).

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

27977449560 is a wasteful number, since it uses less digits than its factorization.

27977449560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8039540 (or 8039536 counting only the distinct ones).

The product of its (nonzero) digits is 26671680, while the sum is 60.

The spelling of 27977449560 in words is "twenty-seven billion, nine hundred seventy-seven million, four hundred forty-nine thousand, five hundred sixty".