51252444425216 has 88 divisors (see below), whose sum is σ = 103093285842480. Its totient is φ = 25466665254912.

The previous prime is 51252444425213. The next prime is 51252444425219. The reversal of 51252444425216 is 61252444425215.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51252444425213) and next prime (51252444425219).

It is not an unprimeable number, because it can be changed into a prime (51252444425213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401894135 + ... + 402021641.

Almost surely, 2^{51252444425216} 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 51252444425216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51546642921240).

51252444425216 is an abundant number, since it is smaller than the sum of its proper divisors (51840841417264).

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

51252444425216 is a wasteful number, since it uses less digits than its factorization.

51252444425216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129969 (or 129951 counting only the distinct ones).

The product of its digits is 3072000, while the sum is 47.

Subtracting 51252444425216 from its reverse (61252444425215), we obtain a palindrome (9999999999999).

The spelling of 51252444425216 in words is "fifty-one trillion, two hundred fifty-two billion, four hundred forty-four million, four hundred twenty-five thousand, two hundred sixteen".