561537216239 has 4 divisors (see below), whose sum is σ = 561584900760. Its totient is φ = 561489531720.

The previous prime is 561537216223. The next prime is 561537216287. The reversal of 561537216239 is 932612735165.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561537216239 - 2⁴ = 561537216223 is a prime.

It is a super-4 number, since 4×561537216239⁴ (a number of 48 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561537216739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23824592 + ... + 23848149.

It is an arithmetic number, because the mean of its divisors is an integer number (140396225190).

Almost surely, 2^561537216239 is an apocalyptic number.

561537216239 is a deficient number, since it is larger than the sum of its proper divisors (47684521).

561537216239 is a wasteful number, since it uses less digits than its factorization.

561537216239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47684520.

The product of its digits is 2041200, while the sum is 50.

The spelling of 561537216239 in words is "five hundred sixty-one billion, five hundred thirty-seven million, two hundred sixteen thousand, two hundred thirty-nine".