561878878094 has 8 divisors (see below), whose sum is σ = 842837206680. Its totient is φ = 280933142536.

The previous prime is 561878878081. The next prime is 561878878103. The reversal of 561878878094 is 490878878165.

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

It is a super-2 number, since 2×561878878094² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3035909 + ... + 3215664.

It is an arithmetic number, because the mean of its divisors is an integer number (105354650835).

Almost surely, 2^561878878094 is an apocalyptic number.

561878878094 is a deficient number, since it is larger than the sum of its proper divisors (280958328586).

561878878094 is a wasteful number, since it uses less digits than its factorization.

561878878094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6296514.

The product of its (nonzero) digits is 216760320, while the sum is 71.

Adding to 561878878094 its sum of digits (71), we get a palindrome (561878878165).

The spelling of 561878878094 in words is "five hundred sixty-one billion, eight hundred seventy-eight million, eight hundred seventy-eight thousand, ninety-four".