1617793402647 has 4 divisors (see below), whose sum is σ = 2157057870200. Its totient is φ = 1078528935096.

The previous prime is 1617793402637. The next prime is 1617793402697. The reversal of 1617793402647 is 7462043977161.

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

It is not a de Polignac number, because 1617793402647 - 2⁸ = 1617793402391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1617793402627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269632233772 + ... + 269632233777.

It is an arithmetic number, because the mean of its divisors is an integer number (539264467550).

Almost surely, 2^{1617793402647} is an apocalyptic number.

1617793402647 is a deficient number, since it is larger than the sum of its proper divisors (539264467553).

1617793402647 is an equidigital number, since it uses as much as digits as its factorization.

1617793402647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539264467552.

The product of its (nonzero) digits is 10668672, while the sum is 57.

The spelling of 1617793402647 in words is "one trillion, six hundred seventeen billion, seven hundred ninety-three million, four hundred two thousand, six hundred forty-seven".