55641603442 has 4 divisors (see below), whose sum is σ = 83462405166. Its totient is φ = 27820801720.

The previous prime is 55641603373. The next prime is 55641603461. The reversal of 55641603442 is 24430614655.

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

It can be written as a sum of positive squares in only one way, i.e., 55583249121 + 58354321 = 235761^2 + 7639^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 55641603395 and 55641603404.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13910400859 + ... + 13910400862.

Almost surely, 2^55641603442 is an apocalyptic number.

55641603442 is a deficient number, since it is larger than the sum of its proper divisors (27820801724).

55641603442 is a wasteful number, since it uses less digits than its factorization.

55641603442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27820801723.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 55641603442 in words is "fifty-five billion, six hundred forty-one million, six hundred three thousand, four hundred forty-two".