55123430405 has 32 divisors (see below), whose sum is σ = 70004325600. Its totient is φ = 41608691712.

The previous prime is 55123430399. The next prime is 55123430419. The reversal of 55123430405 is 50403432155.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 2642576836 + 52480853569 = 51406^2 + 229087^2 .

It is a cyclic number.

It is not a de Polignac number, because 55123430405 - 2⁸ = 55123430149 is a prime.

It is a super-2 number, since 2×55123430405² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1129877 + ... + 1177653.

It is an arithmetic number, because the mean of its divisors is an integer number (2187635175).

Almost surely, 2^55123430405 is an apocalyptic number.

It is an amenable number.

55123430405 is a deficient number, since it is larger than the sum of its proper divisors (14880895195).

55123430405 is a wasteful number, since it uses less digits than its factorization.

55123430405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47993.

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 55123430405 in words is "fifty-five billion, one hundred twenty-three million, four hundred thirty thousand, four hundred five".