561021363511 has 16 divisors (see below), whose sum is σ = 663674299200. Its totient is φ = 464015075328.

The previous prime is 561021363493. The next prime is 561021363541. The reversal of 561021363511 is 115363120165.

It is not a de Polignac number, because 561021363511 - 2²⁷ = 560887145783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561021363541) 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, 489130 + ... + 1166743.

It is an arithmetic number, because the mean of its divisors is an integer number (41479643700).

Almost surely, 2^561021363511 is an apocalyptic number.

561021363511 is a deficient number, since it is larger than the sum of its proper divisors (102652935689).

561021363511 is a wasteful number, since it uses less digits than its factorization.

561021363511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657578.

The product of its (nonzero) digits is 16200, while the sum is 34.

Adding to 561021363511 its reverse (115363120165), we get a palindrome (676384483676).

The spelling of 561021363511 in words is "five hundred sixty-one billion, twenty-one million, three hundred sixty-three thousand, five hundred eleven".