27477720072747 has 72 divisors (see below), whose sum is σ = 46347856074000. Its totient is φ = 15641100413568.

The previous prime is 27477720072713. The next prime is 27477720072749. The reversal of 27477720072747 is 74727002777472.

27477720072747 is a `hidden beast` number, since 2 + 7 + 477 + 7 + 20 + 0 + 72 + 74 + 7 = 666.

It is not a de Polignac number, because 27477720072747 - 2⁴⁰ = 26378208444971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (27477720072749) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1530186493 + ... + 1530204449.

It is an arithmetic number, because the mean of its divisors is an integer number (643720223250).

Almost surely, 2^{27477720072747} is an apocalyptic number.

27477720072747 is a deficient number, since it is larger than the sum of its proper divisors (18870136001253).

27477720072747 is a wasteful number, since it uses less digits than its factorization.

27477720072747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31145 (or 31135 counting only the distinct ones).

The product of its (nonzero) digits is 105413504, while the sum is 63.

The spelling of 27477720072747 in words is "twenty-seven trillion, four hundred seventy-seven billion, seven hundred twenty million, seventy-two thousand, seven hundred forty-seven".