617731420071487 has 2 divisors, whose sum is σ = 617731420071488. Its totient is φ = 617731420071486.

The previous prime is 617731420071449. The next prime is 617731420071539. The reversal of 617731420071487 is 784170024137716.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-617731420071487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617731420011487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308865710035743 + 308865710035744.

It is an arithmetic number, because the mean of its divisors is an integer number (308865710035744).

Almost surely, 2^{617731420071487} is an apocalyptic number.

617731420071487 is a deficient number, since it is larger than the sum of its proper divisors (1).

617731420071487 is an equidigital number, since it uses as much as digits as its factorization.

617731420071487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11063808, while the sum is 58.

The spelling of 617731420071487 in words is "six hundred seventeen trillion, seven hundred thirty-one billion, four hundred twenty million, seventy-one thousand, four hundred eighty-seven".