55397765760 has 128 divisors (see below), whose sum is σ = 177971558400. Its totient is φ = 14656352256.

The previous prime is 55397765741. The next prime is 55397765849. The reversal of 55397765760 is 6756779355.

55397765760 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 55397765694 and 55397765703.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130246 + ... + 357434.

It is an arithmetic number, because the mean of its divisors is an integer number (1390402800).

Almost surely, 2^55397765760 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 55397765760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88985779200).

55397765760 is an abundant number, since it is smaller than the sum of its proper divisors (122573792640).

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

55397765760 is a wasteful number, since it uses less digits than its factorization.

55397765760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227338 (or 227326 counting only the distinct ones).

The product of its (nonzero) digits is 41674500, while the sum is 60.

The spelling of 55397765760 in words is "fifty-five billion, three hundred ninety-seven million, seven hundred sixty-five thousand, seven hundred sixty".