561004550040 has 96 divisors (see below), whose sum is σ = 1849924142640. Its totient is φ = 136001099520.

The previous prime is 561004550017. The next prime is 561004550047. The reversal of 561004550040 is 40055400165.

It is a super-2 number, since 2×561004550040² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561004550047) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 19303819 + ... + 19332858.

Almost surely, 2^561004550040 is an apocalyptic number.

It is an amenable number.

561004550040 is an abundant number, since it is smaller than the sum of its proper divisors (1288919592600).

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

561004550040 is a wasteful number, since it uses less digits than its factorization.

561004550040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38636713 (or 38636698 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 561004550040 in words is "five hundred sixty-one billion, four million, five hundred fifty thousand, forty".