5661235267440 has 160 divisors (see below), whose sum is σ = 17654347103040. Its totient is φ = 1500675022848.

The previous prime is 5661235267433. The next prime is 5661235267453. The reversal of 5661235267440 is 447625321665.

It is a congruent number.

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, 404107156 + ... + 404121164.

It is an arithmetic number, because the mean of its divisors is an integer number (110339669394).

Almost surely, 2^{5661235267440} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5661235267440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8827173551520).

5661235267440 is an abundant number, since it is smaller than the sum of its proper divisors (11993111835600).

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

5661235267440 is a wasteful number, since it uses less digits than its factorization.

5661235267440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23931 (or 23925 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 51.

The spelling of 5661235267440 in words is "five trillion, six hundred sixty-one billion, two hundred thirty-five million, two hundred sixty-seven thousand, four hundred forty".