51630555031552 has 96 divisors (see below), whose sum is σ = 118057265726400. Its totient is φ = 22113618591744.

The previous prime is 51630555031519. The next prime is 51630555031609. The reversal of 51630555031552 is 25513055503615.

It is a super-2 number, since 2×51630555031552² (a number of 28 digits) contains 22 as substring.

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, 21947463 + ... + 24185785.

It is an arithmetic number, because the mean of its divisors is an integer number (1229763184650).

Almost surely, 2^{51630555031552} 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 51630555031552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59028632863200).

51630555031552 is an abundant number, since it is smaller than the sum of its proper divisors (66426710694848).

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

51630555031552 is a wasteful number, since it uses less digits than its factorization.

51630555031552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239961 (or 2239941 counting only the distinct ones).

The product of its (nonzero) digits is 1687500, while the sum is 46.

The spelling of 51630555031552 in words is "fifty-one trillion, six hundred thirty billion, five hundred fifty-five million, thirty-one thousand, five hundred fifty-two".