51405045330 has 128 divisors (see below), whose sum is σ = 129823948800. Its totient is φ = 13009377024.

The previous prime is 51405045323. The next prime is 51405045371. The reversal of 51405045330 is 3354050415.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12453727 + ... + 12457853.

It is an arithmetic number, because the mean of its divisors is an integer number (1014249600).

Almost surely, 2^51405045330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51405045330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64911974400).

51405045330 is an abundant number, since it is smaller than the sum of its proper divisors (78418903470).

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

51405045330 is a wasteful number, since it uses less digits than its factorization.

51405045330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408.

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 51405045330 its reverse (3354050415), we get a palindrome (54759095745).

The spelling of 51405045330 in words is "fifty-one billion, four hundred five million, forty-five thousand, three hundred thirty".