561357545457863 has 12 divisors (see below), whose sum is σ = 705176420741520. Its totient is φ = 437421463992480.

The previous prime is 561357545457853. The next prime is 561357545457923. The reversal of 561357545457863 is 368754545753165.

It is not a de Polignac number, because 561357545457863 - 2¹² = 561357545453767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561357545457853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331379896118 + ... + 331379897811.

It is an arithmetic number, because the mean of its divisors is an integer number (58764701728460).

Almost surely, 2^{561357545457863} is an apocalyptic number.

561357545457863 is a deficient number, since it is larger than the sum of its proper divisors (143818875283657).

561357545457863 is a wasteful number, since it uses less digits than its factorization.

561357545457863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662759793958 (or 662759793947 counting only the distinct ones).

The product of its digits is 6350400000, while the sum is 74.

The spelling of 561357545457863 in words is "five hundred sixty-one trillion, three hundred fifty-seven billion, five hundred forty-five million, four hundred fifty-seven thousand, eight hundred sixty-three".