561178468494 has 192 divisors, whose sum is σ = 1509579244800. Its totient is φ = 153951731136.

The previous prime is 561178468489. The next prime is 561178468507. The reversal of 561178468494 is 494864871165.

561178468494 is a `hidden beast` number, since 5 + 6 + 1 + 1 + 7 + 84 + 68 + 494 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6671104 + ... + 6754700.

It is an arithmetic number, because the mean of its divisors is an integer number (7862391900).

Almost surely, 2^561178468494 is an apocalyptic number.

561178468494 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 561178468494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (754789622400).

561178468494 is an abundant number, since it is smaller than the sum of its proper divisors (948400776306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561178468494 is a wasteful number, since it uses less digits than its factorization.

561178468494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83724 (or 83711 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 561178468494 in words is "five hundred sixty-one billion, one hundred seventy-eight million, four hundred sixty-eight thousand, four hundred ninety-four".