647747135027 has 4 divisors (see below), whose sum is σ = 649613841816. Its totient is φ = 645880428240.

The previous prime is 647747134933. The next prime is 647747135083. The reversal of 647747135027 is 720531747746.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 647747135027 - 2²⁶ = 647680026163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 647747135027.

It is not an unprimeable number, because it can be changed into a prime (647747135527) 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, 933352874 + ... + 933353567.

It is an arithmetic number, because the mean of its divisors is an integer number (162403460454).

Almost surely, 2^647747135027 is an apocalyptic number.

647747135027 is a deficient number, since it is larger than the sum of its proper divisors (1866706789).

647747135027 is a wasteful number, since it uses less digits than its factorization.

647747135027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866706788.

The product of its (nonzero) digits is 6914880, while the sum is 53.

The spelling of 647747135027 in words is "six hundred forty-seven billion, seven hundred forty-seven million, one hundred thirty-five thousand, twenty-seven".