56423537720 has 128 divisors (see below), whose sum is σ = 150486681600. Its totient is φ = 18810662400.

The previous prime is 56423537717. The next prime is 56423537743. The reversal of 56423537720 is 2773532465.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150302 + ... + 368018.

It is an arithmetic number, because the mean of its divisors is an integer number (1175677200).

Almost surely, 2^56423537720 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 56423537720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75243340800).

56423537720 is an abundant number, since it is smaller than the sum of its proper divisors (94063143880).

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

56423537720 is a wasteful number, since it uses less digits than its factorization.

56423537720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217789 (or 217785 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 44.

The spelling of 56423537720 in words is "fifty-six billion, four hundred twenty-three million, five hundred thirty-seven thousand, seven hundred twenty".