531688047647 has 2 divisors, whose sum is σ = 531688047648. Its totient is φ = 531688047646.

The previous prime is 531688047641. The next prime is 531688047713. The reversal of 531688047647 is 746740886135.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531688047647 - 2¹⁰ = 531688046623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531688047641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265844023823 + 265844023824.

It is an arithmetic number, because the mean of its divisors is an integer number (265844023824).

Almost surely, 2^531688047647 is an apocalyptic number.

531688047647 is a deficient number, since it is larger than the sum of its proper divisors (1).

531688047647 is an equidigital number, since it uses as much as digits as its factorization.

531688047647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27095040, while the sum is 59.

The spelling of 531688047647 in words is "five hundred thirty-one billion, six hundred eighty-eight million, forty-seven thousand, six hundred forty-seven".