55645340051 has 4 divisors (see below), whose sum is σ = 63594674352. Its totient is φ = 47696005752.

The previous prime is 55645340027. The next prime is 55645340057. The reversal of 55645340051 is 15004354655.

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 55645340051 - 2⁶ = 55645339987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55645339987 and 55645340014.

It is not an unprimeable number, because it can be changed into a prime (55645340057) 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, 3974667140 + ... + 3974667153.

It is an arithmetic number, because the mean of its divisors is an integer number (15898668588).

Almost surely, 2^55645340051 is an apocalyptic number.

55645340051 is a deficient number, since it is larger than the sum of its proper divisors (7949334301).

55645340051 is an equidigital number, since it uses as much as digits as its factorization.

55645340051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7949334300.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 55645340051 in words is "fifty-five billion, six hundred forty-five million, three hundred forty thousand, fifty-one".