55505007749 has 4 divisors (see below), whose sum is σ = 55529343660. Its totient is φ = 55480671840.

The previous prime is 55505007673. The next prime is 55505007773. The reversal of 55505007749 is 94770050555.

55505007749 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 15791692225 + 39713315524 = 125665^2 + 199282^2 .

It is a cyclic number.

It is not a de Polignac number, because 55505007749 - 2²⁴ = 55488230533 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 (55505007049) 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, 12164534 + ... + 12169095.

It is an arithmetic number, because the mean of its divisors is an integer number (13882335915).

Almost surely, 2^55505007749 is an apocalyptic number.

It is an amenable number.

55505007749 is a deficient number, since it is larger than the sum of its proper divisors (24335911).

55505007749 is a wasteful number, since it uses less digits than its factorization.

55505007749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24335910.

The product of its (nonzero) digits is 1102500, while the sum is 47.

The spelling of 55505007749 in words is "fifty-five billion, five hundred five million, seven thousand, seven hundred forty-nine".