561218553411 has 16 divisors (see below), whose sum is σ = 793233121824. Its totient is φ = 351726209024.

The previous prime is 561218553409. The next prime is 561218553421. The reversal of 561218553411 is 114355812165.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 561218553411 - 2¹ = 561218553409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561218553421) 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, 6376530 + ... + 6463943.

It is an arithmetic number, because the mean of its divisors is an integer number (49577070114).

Almost surely, 2^561218553411 is an apocalyptic number.

561218553411 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

561218553411 is a deficient number, since it is larger than the sum of its proper divisors (232014568413).

561218553411 is a wasteful number, since it uses less digits than its factorization.

561218553411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12841350.

The product of its digits is 144000, while the sum is 42.

The spelling of 561218553411 in words is "five hundred sixty-one billion, two hundred eighteen million, five hundred fifty-three thousand, four hundred eleven".