55633138178 has 6 divisors (see below), whose sum is σ = 83450207619. Its totient is φ = 27816402306.

The previous prime is 55633138153. The next prime is 55633138193. The reversal of 55633138178 is 87183133655.

It can be written as a sum of positive squares in only one way, i.e., 27816569089 + 27816569089 = 166783^2 + 166783^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=166783.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 250175 + ... + 416957.

Almost surely, 2^55633138178 is an apocalyptic number.

55633138178 is a deficient number, since it is larger than the sum of its proper divisors (27817069441).

55633138178 is an frugal number, since it uses more digits than its factorization.

55633138178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333568 (or 166785 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 50.

Multiplying 55633138178 by its sum of digits (50), we get a square (2781656908900 = 1667830²).

The spelling of 55633138178 in words is "fifty-five billion, six hundred thirty-three million, one hundred thirty-eight thousand, one hundred seventy-eight".