55906013777 has 4 divisors (see below), whose sum is σ = 56229170100. Its totient is φ = 55582857456.

The previous prime is 55906013771. The next prime is 55906013783. The reversal of 55906013777 is 77731060955.

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

It is an interprime number because it is at equal distance from previous prime (55906013771) and next prime (55906013783).

It can be written as a sum of positive squares in 2 ways, for example, as 47000505616 + 8905508161 = 216796^2 + 94369^2 .

It is a cyclic number.

It is not a de Polignac number, because 55906013777 - 2¹⁰ = 55906012753 is a prime.

It is a super-2 number, since 2×55906013777² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55906013771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161577902 + ... + 161578247.

It is an arithmetic number, because the mean of its divisors is an integer number (14057292525).

Almost surely, 2^55906013777 is an apocalyptic number.

It is an amenable number.

55906013777 is a deficient number, since it is larger than the sum of its proper divisors (323156323).

55906013777 is a wasteful number, since it uses less digits than its factorization.

55906013777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323156322.

The product of its (nonzero) digits is 1389150, while the sum is 50.

The spelling of 55906013777 in words is "fifty-five billion, nine hundred six million, thirteen thousand, seven hundred seventy-seven".