55581474349 has 4 divisors (see below), whose sum is σ = 55581992064. Its totient is φ = 55580956636.

The previous prime is 55581474341. The next prime is 55581474373. The reversal of 55581474349 is 94347418555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 55581474349 - 2³ = 55581474341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55581474349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55581474341) 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, 30907 + ... + 334840.

It is an arithmetic number, because the mean of its divisors is an integer number (13895498016).

Almost surely, 2^55581474349 is an apocalyptic number.

It is an amenable number.

55581474349 is a deficient number, since it is larger than the sum of its proper divisors (517715).

55581474349 is a wasteful number, since it uses less digits than its factorization.

55581474349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517714.

The product of its digits is 12096000, while the sum is 55.

The spelling of 55581474349 in words is "fifty-five billion, five hundred eighty-one million, four hundred seventy-four thousand, three hundred forty-nine".