55000000064 has 28 divisors (see below), whose sum is σ = 109195531164. Its totient is φ = 27486165504.

The previous prime is 55000000039. The next prime is 55000000087. The reversal of 55000000064 is 46000000055.

It can be written as a sum of positive squares in 2 ways, for example, as 1324377664 + 53675622400 = 36392^2 + 231680^2 .

It is a junction number, because it is equal to n+sod(n) for n = 54999999982 and 55000000045.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87359 + ... + 342974.

Almost surely, 2^55000000064 is an apocalyptic number.

It is an amenable number.

55000000064 is a deficient number, since it is larger than the sum of its proper divisors (54195531100).

55000000064 is a wasteful number, since it uses less digits than its factorization.

55000000064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432342 (or 432332 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

Subtracting from 55000000064 its reverse (46000000055), we obtain a palindrome (9000000009).

The spelling of 55000000064 in words is "fifty-five billion, sixty-four", and thus it is an aban number.