27547463664 has 420 divisors, whose sum is σ = 93986291784. Its totient is φ = 7795097856.

The previous prime is 27547463659. The next prime is 27547463681. The reversal of 27547463664 is 46636474572.

27547463664 is a `hidden beast` number, since 2 + 7 + 547 + 4 + 6 + 36 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (20321280) is a multiple of the sum of its prime factors (504).

It is a self number, because there is not a number n which added to its sum of digits gives 27547463664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 89730999 + ... + 89731305.

Almost surely, 2^27547463664 is an apocalyptic number.

27547463664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27547463664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46993145892).

27547463664 is an abundant number, since it is smaller than the sum of its proper divisors (66438828120).

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

27547463664 is a wasteful number, since it uses less digits than its factorization.

27547463664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 476 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 54.

The spelling of 27547463664 in words is "twenty-seven billion, five hundred forty-seven million, four hundred sixty-three thousand, six hundred sixty-four".