1561413343344 has 80 divisors (see below), whose sum is σ = 4078982928384. Its totient is φ = 514637164800.

The previous prime is 1561413343339. The next prime is 1561413343349. The reversal of 1561413343344 is 4433433141651.

It is an interprime number because it is at equal distance from previous prime (1561413343339) and next prime (1561413343349).

It is a junction number, because it is equal to n+sod(n) for n = 1561413343296 and 1561413343305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561413343349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3029089 + ... + 3506879.

Almost surely, 2^{1561413343344} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1561413343344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2039491464192).

1561413343344 is an abundant number, since it is smaller than the sum of its proper divisors (2517569585040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1561413343344 is a wasteful number, since it uses less digits than its factorization.

1561413343344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478566 (or 478560 counting only the distinct ones).

The product of its digits is 622080, while the sum is 42.

Adding to 1561413343344 its reverse (4433433141651), we get a palindrome (5994846484995).

The spelling of 1561413343344 in words is "one trillion, five hundred sixty-one billion, four hundred thirteen million, three hundred forty-three thousand, three hundred forty-four".