647373681241 has 4 divisors (see below), whose sum is σ = 739855635712. Its totient is φ = 554891726772.

The previous prime is 647373681211. The next prime is 647373681271. The reversal of 647373681241 is 142186373746.

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 an interprime number because it is at equal distance from previous prime (647373681211) and next prime (647373681271).

It is a cyclic number.

It is not a de Polignac number, because 647373681241 - 2³¹ = 645226197593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647373681211) 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, 46240977225 + ... + 46240977238.

It is an arithmetic number, because the mean of its divisors is an integer number (184963908928).

Almost surely, 2^647373681241 is an apocalyptic number.

It is an amenable number.

647373681241 is a deficient number, since it is larger than the sum of its proper divisors (92481954471).

647373681241 is an equidigital number, since it uses as much as digits as its factorization.

647373681241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92481954470.

The product of its digits is 4064256, while the sum is 52.

The spelling of 647373681241 in words is "six hundred forty-seven billion, three hundred seventy-three million, six hundred eighty-one thousand, two hundred forty-one".