55032507778 has 16 divisors (see below), whose sum is σ = 85534633080. Its totient is φ = 26524060416.

The previous prime is 55032507773. The next prime is 55032507779. The reversal of 55032507778 is 87770523055.

It can be written as a sum of positive squares in 4 ways, for example, as 29139514209 + 25892993569 = 170703^2 + 160913^2 .

It is not an unprimeable number, because it can be changed into a prime (55032507773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738375 + ... + 809482.

Almost surely, 2^55032507778 is an apocalyptic number.

55032507778 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

55032507778 is a deficient number, since it is larger than the sum of its proper divisors (30502125302).

55032507778 is a wasteful number, since it uses less digits than its factorization.

55032507778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548501.

The product of its (nonzero) digits is 2058000, while the sum is 49.

The spelling of 55032507778 in words is "fifty-five billion, thirty-two million, five hundred seven thousand, seven hundred seventy-eight".