51306584240420 has 12 divisors (see below), whose sum is σ = 107743826904924. Its totient is φ = 20522633696160.

The previous prime is 51306584240333. The next prime is 51306584240491. The reversal of 51306584240420 is 2404248560315.

It can be written as a sum of positive squares in 2 ways, for example, as 22828309298404 + 28478274942016 = 4777898^2 + 5336504^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282664605991 + ... + 1282664606030.

It is an arithmetic number, because the mean of its divisors is an integer number (8978652242077).

Almost surely, 2^{51306584240420} is an apocalyptic number.

It is an amenable number.

51306584240420 is an abundant number, since it is smaller than the sum of its proper divisors (56437242664504).

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

51306584240420 is a wasteful number, since it uses less digits than its factorization.

51306584240420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565329212030 (or 2565329212028 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 44.

The spelling of 51306584240420 in words is "fifty-one trillion, three hundred six billion, five hundred eighty-four million, two hundred forty thousand, four hundred twenty".