3561543574440 has 128 divisors (see below), whose sum is σ = 10797689664000. Its totient is φ = 939745916928.

The previous prime is 3561543574301. The next prime is 3561543574453. The reversal of 3561543574440 is 444753451653.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4107276 + ... + 4898244.

It is an arithmetic number, because the mean of its divisors is an integer number (84356950500).

Almost surely, 2^{3561543574440} is an apocalyptic number.

3561543574440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3561543574440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5398844832000).

3561543574440 is an abundant number, since it is smaller than the sum of its proper divisors (7236146089560).

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

3561543574440 is a wasteful number, since it uses less digits than its factorization.

3561543574440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791379 (or 791375 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 51.

The spelling of 3561543574440 in words is "three trillion, five hundred sixty-one billion, five hundred forty-three million, five hundred seventy-four thousand, four hundred forty".