51775450452 has 240 divisors, whose sum is σ = 156589836480. Its totient is φ = 14752627200.

The previous prime is 51775450399. The next prime is 51775450459. The reversal of 51775450452 is 25405457715.

51775450452 is a `hidden beast` number, since 51 + 7 + 7 + 545 + 0 + 4 + 52 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 51775450398 and 51775450407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51775450459) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9274302 + ... + 9279882.

It is an arithmetic number, because the mean of its divisors is an integer number (652457652).

Almost surely, 2^51775450452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51775450452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78294918240).

51775450452 is an abundant number, since it is smaller than the sum of its proper divisors (104814386028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51775450452 is a wasteful number, since it uses less digits than its factorization.

51775450452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5764 (or 5753 counting only the distinct ones).

The product of its (nonzero) digits is 980000, while the sum is 45.

The spelling of 51775450452 in words is "fifty-one billion, seven hundred seventy-five million, four hundred fifty thousand, four hundred fifty-two".