55640019792 has 240 divisors, whose sum is σ = 172131244800. Its totient is φ = 15435463680.

The previous prime is 55640019779. The next prime is 55640019793. The reversal of 55640019792 is 29791004655.

55640019792 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55640019793) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11331834 + ... + 11336742.

It is an arithmetic number, because the mean of its divisors is an integer number (717213520).

Almost surely, 2^55640019792 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 55640019792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86065622400).

55640019792 is an abundant number, since it is smaller than the sum of its proper divisors (116491225008).

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

55640019792 is a wasteful number, since it uses less digits than its factorization.

55640019792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5074 (or 5061 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 48.

The spelling of 55640019792 in words is "fifty-five billion, six hundred forty million, nineteen thousand, seven hundred ninety-two".