617731420071523 has 4 divisors (see below), whose sum is σ = 617835188164168. Its totient is φ = 617627651978880.

The previous prime is 617731420071487. The next prime is 617731420071539. The reversal of 617731420071523 is 325170024137716.

617731420071523 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.

It is a cyclic number.

It is not a de Polignac number, because 617731420071523 - 2¹⁷ = 617731419940451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617731427071523) 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, 51884037393 + ... + 51884049298.

It is an arithmetic number, because the mean of its divisors is an integer number (154458797041042).

Almost surely, 2^{617731420071523} is an apocalyptic number.

617731420071523 is a deficient number, since it is larger than the sum of its proper divisors (103768092645).

617731420071523 is a wasteful number, since it uses less digits than its factorization.

617731420071523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103768092644.

The product of its (nonzero) digits is 1481760, while the sum is 49.

The spelling of 617731420071523 in words is "six hundred seventeen trillion, seven hundred thirty-one billion, four hundred twenty million, seventy-one thousand, five hundred twenty-three".