51304734642 has 32 divisors (see below), whose sum is σ = 117569462400. Its totient is φ = 14620808448.

The previous prime is 51304734623. The next prime is 51304734643. The reversal of 51304734642 is 24643740315.

It is a self number, because there is not a number n which added to its sum of digits gives 51304734642.

It is not an unprimeable number, because it can be changed into a prime (51304734643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1553767 + ... + 1586442.

It is an arithmetic number, because the mean of its divisors is an integer number (3674045700).

Almost surely, 2^51304734642 is an apocalyptic number.

51304734642 is an abundant number, since it is smaller than the sum of its proper divisors (66264727758).

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

51304734642 is a wasteful number, since it uses less digits than its factorization.

51304734642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140610.

The product of its (nonzero) digits is 241920, while the sum is 39.

The spelling of 51304734642 in words is "fifty-one billion, three hundred four million, seven hundred thirty-four thousand, six hundred forty-two".