561665426342453 has 8 divisors (see below), whose sum is σ = 562010006275200. Its totient is φ = 561320922248128.

The previous prime is 561665426342429. The next prime is 561665426342477. The reversal of 561665426342453 is 354243624566165.

It is an interprime number because it is at equal distance from previous prime (561665426342429) and next prime (561665426342477).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561665426342453 - 2¹⁶ = 561665426276917 is a prime.

It is a super-2 number, since 2×561665426342453² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561665426342653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4139351 + ... + 33770772.

It is an arithmetic number, because the mean of its divisors is an integer number (70251250784400).

Almost surely, 2^{561665426342453} is an apocalyptic number.

It is an amenable number.

561665426342453 is a deficient number, since it is larger than the sum of its proper divisors (344579932747).

561665426342453 is a wasteful number, since it uses less digits than its factorization.

561665426342453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37919211.

The product of its digits is 373248000, while the sum is 62.

The spelling of 561665426342453 in words is "five hundred sixty-one trillion, six hundred sixty-five billion, four hundred twenty-six million, three hundred forty-two thousand, four hundred fifty-three".