561118013 has 16 divisors (see below), whose sum is σ = 613824000. Its totient is φ = 510898752.

The previous prime is 561118003. The next prime is 561118027. The reversal of 561118013 is 310811165.

It is not a de Polignac number, because 561118013 - 2²² = 556923709 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 (561118003) 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, 123956 + ... + 128402.

It is an arithmetic number, because the mean of its divisors is an integer number (38364000).

Almost surely, 2^561118013 is an apocalyptic number.

It is an amenable number.

561118013 is a deficient number, since it is larger than the sum of its proper divisors (52705987).

561118013 is a wasteful number, since it uses less digits than its factorization.

561118013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4724.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 561118013 is about 23687.9296900341. The cubic root of 561118013 is about 824.8052251547.

Adding to 561118013 its reverse (310811165), we get a palindrome (871929178).

The spelling of 561118013 in words is "five hundred sixty-one million, one hundred eighteen thousand, thirteen".