51105404045 has 4 divisors (see below), whose sum is σ = 61326484860. Its totient is φ = 40884323232.

The previous prime is 51105404039. The next prime is 51105404057. The reversal of 51105404045 is 54040450115.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5849649289 + 45255754756 = 76483^2 + 212734^2 .

It is a cyclic number.

It is not a de Polignac number, because 51105404045 - 2¹⁶ = 51105338509 is a prime.

It is a super-2 number, since 2×51105404045² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51105403999 and 51105404017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5110540400 + ... + 5110540409.

It is an arithmetic number, because the mean of its divisors is an integer number (15331621215).

Almost surely, 2^51105404045 is an apocalyptic number.

It is an amenable number.

51105404045 is a deficient number, since it is larger than the sum of its proper divisors (10221080815).

51105404045 is a wasteful number, since it uses less digits than its factorization.

51105404045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10221080814.

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 51105404045 in words is "fifty-one billion, one hundred five million, four hundred four thousand, forty-five".