51345565720252 has 12 divisors (see below), whose sum is σ = 89961837441840. Its totient is φ = 25642183594016.

The previous prime is 51345565720249. The next prime is 51345565720303. The reversal of 51345565720252 is 25202756554315.

It is a self number, because there is not a number n which added to its sum of digits gives 51345565720252.

It is a congruent number.

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, 7649812753 + ... + 7649819464.

It is an arithmetic number, because the mean of its divisors is an integer number (7496819786820).

Almost surely, 2^{51345565720252} is an apocalyptic number.

It is an amenable number.

51345565720252 is a deficient number, since it is larger than the sum of its proper divisors (38616271721588).

51345565720252 is a wasteful number, since it uses less digits than its factorization.

51345565720252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15299633060 (or 15299633058 counting only the distinct ones).

The product of its (nonzero) digits is 12600000, while the sum is 52.

The spelling of 51345565720252 in words is "fifty-one trillion, three hundred forty-five billion, five hundred sixty-five million, seven hundred twenty thousand, two hundred fifty-two".