55454250561 has 4 divisors (see below), whose sum is σ = 73939000752. Its totient is φ = 36969500372.

The previous prime is 55454250517. The next prime is 55454250587. The reversal of 55454250561 is 16505245455.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55454250561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55454240561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9242375091 + ... + 9242375096.

It is an arithmetic number, because the mean of its divisors is an integer number (18484750188).

Almost surely, 2^55454250561 is an apocalyptic number.

It is an amenable number.

55454250561 is a deficient number, since it is larger than the sum of its proper divisors (18484750191).

55454250561 is a wasteful number, since it uses less digits than its factorization.

55454250561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18484750190.

The product of its (nonzero) digits is 600000, while the sum is 42.

The spelling of 55454250561 in words is "fifty-five billion, four hundred fifty-four million, two hundred fifty thousand, five hundred sixty-one".