561557116379 has 8 divisors (see below), whose sum is σ = 642308655840. Its totient is φ = 480937850496.

The previous prime is 561557116363. The next prime is 561557116427. The reversal of 561557116379 is 973611755165.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561557116379 - 2⁴ = 561557116363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561554116379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33059294 + ... + 33076275.

It is an arithmetic number, because the mean of its divisors is an integer number (80288581980).

Almost surely, 2^561557116379 is an apocalyptic number.

561557116379 is a deficient number, since it is larger than the sum of its proper divisors (80751539461).

561557116379 is a wasteful number, since it uses less digits than its factorization.

561557116379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66136789.

The product of its digits is 5953500, while the sum is 56.

The spelling of 561557116379 in words is "five hundred sixty-one billion, five hundred fifty-seven million, one hundred sixteen thousand, three hundred seventy-nine".