51330402330402 has 128 divisors (see below), whose sum is σ = 112116533501952. Its totient is φ = 15572095200000.

The previous prime is 51330402330397. The next prime is 51330402330419. The reversal of 51330402330402 is 20403320403315.

It is a self number, because there is not a number n which added to its sum of digits gives 51330402330402.

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, 9592672027 + ... + 9592677377.

It is an arithmetic number, because the mean of its divisors is an integer number (875910417984).

Almost surely, 2^{51330402330402} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51330402330402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56058266750976).

51330402330402 is an abundant number, since it is smaller than the sum of its proper divisors (60786131171550).

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

51330402330402 is a wasteful number, since it uses less digits than its factorization.

51330402330402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8176.

The product of its (nonzero) digits is 25920, while the sum is 30.

Adding to 51330402330402 its reverse (20403320403315), we get a palindrome (71733722733717).

The spelling of 51330402330402 in words is "fifty-one trillion, three hundred thirty billion, four hundred two million, three hundred thirty thousand, four hundred two".