55500707477 has 4 divisors (see below), whose sum is σ = 57000726636. Its totient is φ = 54000688320.

The previous prime is 55500707459. The next prime is 55500707491. The reversal of 55500707477 is 77470700555.

55500707477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35932614481 + 19568092996 = 189559^2 + 139886^2 .

It is a cyclic number.

It is not a de Polignac number, because 55500707477 - 2²⁸ = 55232272021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55500707407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750009524 + ... + 750009597.

It is an arithmetic number, because the mean of its divisors is an integer number (14250181659).

Almost surely, 2^55500707477 is an apocalyptic number.

It is an amenable number.

55500707477 is a deficient number, since it is larger than the sum of its proper divisors (1500019159).

55500707477 is a wasteful number, since it uses less digits than its factorization.

55500707477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500019158.

The product of its (nonzero) digits is 1200500, while the sum is 47.

The spelling of 55500707477 in words is "fifty-five billion, five hundred million, seven hundred seven thousand, four hundred seventy-seven".