647146124747 has 4 divisors (see below), whose sum is σ = 647562833400. Its totient is φ = 646729416096.

The previous prime is 647146124699. The next prime is 647146124749. The reversal of 647146124747 is 747421641746.

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 647146124747 - 2⁸ = 647146124491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647146124749) 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, 208351997 + ... + 208355102.

It is an arithmetic number, because the mean of its divisors is an integer number (161890708350).

Almost surely, 2^647146124747 is an apocalyptic number.

647146124747 is a deficient number, since it is larger than the sum of its proper divisors (416708653).

647146124747 is a wasteful number, since it uses less digits than its factorization.

647146124747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416708652.

The product of its digits is 6322176, while the sum is 53.

The spelling of 647146124747 in words is "six hundred forty-seven billion, one hundred forty-six million, one hundred twenty-four thousand, seven hundred forty-seven".