55381650007 has 4 divisors (see below), whose sum is σ = 56669595400. Its totient is φ = 54093704616.

The previous prime is 55381649993. The next prime is 55381650109. The reversal of 55381650007 is 70005618355.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55381650007 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 (55381650307) 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, 643972632 + ... + 643972717.

It is an arithmetic number, because the mean of its divisors is an integer number (14167398850).

Almost surely, 2^55381650007 is an apocalyptic number.

55381650007 is a deficient number, since it is larger than the sum of its proper divisors (1287945393).

55381650007 is a wasteful number, since it uses less digits than its factorization.

55381650007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287945392.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 55381650007 in words is "fifty-five billion, three hundred eighty-one million, six hundred fifty thousand, seven".