51245451245 has 8 divisors (see below), whose sum is σ = 61497317016. Its totient is φ = 40994510656.

The previous prime is 51245451211. The next prime is 51245451311. The reversal of 51245451245 is 54215454215.

It can be written as a sum of positive squares in 4 ways, for example, as 105247081 + 51140204164 = 10259^2 + 226142^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51245451245 - 2⁶ = 51245451181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51245451199 and 51245451208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102962 + ... + 336291.

It is an arithmetic number, because the mean of its divisors is an integer number (7687164627).

Almost surely, 2^51245451245 is an apocalyptic number.

It is an amenable number.

51245451245 is a deficient number, since it is larger than the sum of its proper divisors (10251865771).

51245451245 is a wasteful number, since it uses less digits than its factorization.

51245451245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462591.

The product of its digits is 160000, while the sum is 38.

The spelling of 51245451245 in words is "fifty-one billion, two hundred forty-five million, four hundred fifty-one thousand, two hundred forty-five".