51550887630 has 64 divisors (see below), whose sum is σ = 135261508608. Its totient is φ = 12470156160.

The previous prime is 51550887581. The next prime is 51550887631. The reversal of 51550887630 is 3678805515.

It is a self number, because there is not a number n which added to its sum of digits gives 51550887630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51550887631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15909 + ... + 321488.

It is an arithmetic number, because the mean of its divisors is an integer number (2113461072).

Almost surely, 2^51550887630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51550887630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67630754304).

51550887630 is an abundant number, since it is smaller than the sum of its proper divisors (83710620978).

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

51550887630 is a wasteful number, since it uses less digits than its factorization.

51550887630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337881.

The product of its (nonzero) digits is 1008000, while the sum is 48.

The spelling of 51550887630 in words is "fifty-one billion, five hundred fifty million, eight hundred eighty-seven thousand, six hundred thirty".