561826109376 has 168 divisors, whose sum is σ = 1879585044480. Its totient is φ = 157106336256.

The previous prime is 561826109371. The next prime is 561826109431. The reversal of 561826109376 is 673901628165.

561826109376 is a `hidden beast` number, since 5 + 6 + 1 + 8 + 261 + 0 + 9 + 376 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561826109371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1292856 + ... + 1671863.

Almost surely, 2^561826109376 is an apocalyptic number.

561826109376 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

561826109376 is an abundant number, since it is smaller than the sum of its proper divisors (1317758935104).

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

561826109376 is a wasteful number, since it uses less digits than its factorization.

561826109376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964791 (or 2964778 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 561826109376 in words is "five hundred sixty-one billion, eight hundred twenty-six million, one hundred nine thousand, three hundred seventy-six".