56280091840 has 224 divisors, whose sum is σ = 155067024384. Its totient is φ = 19057766400.

The previous prime is 56280091811. The next prime is 56280091841. The reversal of 56280091840 is 4819008265.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is not an unprimeable number, because it can be changed into a prime (56280091841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76780114 + ... + 76780846.

Almost surely, 2^56280091840 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 56280091840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77533512192).

56280091840 is an abundant number, since it is smaller than the sum of its proper divisors (98786932544).

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

56280091840 is a wasteful number, since it uses less digits than its factorization.

56280091840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135 (or 1125 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 56280091840 in words is "fifty-six billion, two hundred eighty million, ninety-one thousand, eight hundred forty".