55751881447 has 4 divisors (see below), whose sum is σ = 56272927176. Its totient is φ = 55230835720.

The previous prime is 55751881439. The next prime is 55751881499. The reversal of 55751881447 is 74418815755.

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

It is a cyclic number.

It is not a de Polignac number, because 55751881447 - 2³ = 55751881439 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 (55751881417) 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, 260522704 + ... + 260522917.

It is an arithmetic number, because the mean of its divisors is an integer number (14068231794).

Almost surely, 2^55751881447 is an apocalyptic number.

55751881447 is a deficient number, since it is larger than the sum of its proper divisors (521045729).

55751881447 is a wasteful number, since it uses less digits than its factorization.

55751881447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521045728.

The product of its digits is 6272000, while the sum is 55.

The spelling of 55751881447 in words is "fifty-five billion, seven hundred fifty-one million, eight hundred eighty-one thousand, four hundred forty-seven".