55217645764 has 18 divisors (see below), whose sum is σ = 97597166282. Its totient is φ = 27335448000.

The previous prime is 55217645737. The next prime is 55217645767. The reversal of 55217645764 is 46754671255.

55217645764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 44483028100 + 10734617664 = 210910^2 + 103608^2 .

It is not an unprimeable number, because it can be changed into a prime (55217645767) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 635817 + ... + 717424.

Almost surely, 2^55217645764 is an apocalyptic number.

It is an amenable number.

55217645764 is a deficient number, since it is larger than the sum of its proper divisors (42379520518).

55217645764 is a wasteful number, since it uses less digits than its factorization.

55217645764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353447 (or 1353344 counting only the distinct ones).

The product of its digits is 7056000, while the sum is 52.

The spelling of 55217645764 in words is "fifty-five billion, two hundred seventeen million, six hundred forty-five thousand, seven hundred sixty-four".