647911154873 has 4 divisors (see below), whose sum is σ = 647982811728. Its totient is φ = 647839498020.

The previous prime is 647911154797. The next prime is 647911154897. The reversal of 647911154873 is 378451119746.

647911154873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 647911154873 - 2¹⁴ = 647911138489 is a prime.

It is a super-2 number, since 2×647911154873² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647911154573) 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, 35814863 + ... + 35832948.

It is an arithmetic number, because the mean of its divisors is an integer number (161995702932).

Almost surely, 2^647911154873 is an apocalyptic number.

It is an amenable number.

647911154873 is a deficient number, since it is larger than the sum of its proper divisors (71656855).

647911154873 is an equidigital number, since it uses as much as digits as its factorization.

647911154873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71656854.

The product of its digits is 5080320, while the sum is 56.

The spelling of 647911154873 in words is "six hundred forty-seven billion, nine hundred eleven million, one hundred fifty-four thousand, eight hundred seventy-three".