51544623053257 has 4 divisors (see below), whose sum is σ = 51544662670800. Its totient is φ = 51544583435716.

The previous prime is 51544623053233. The next prime is 51544623053263. The reversal of 51544623053257 is 75235032644515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51544623053257 - 2¹¹ = 51544623051209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51544623053227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17788507 + ... + 20482192.

It is an arithmetic number, because the mean of its divisors is an integer number (12886165667700).

Almost surely, 2^{51544623053257} is an apocalyptic number.

It is an amenable number.

51544623053257 is a deficient number, since it is larger than the sum of its proper divisors (39617543).

51544623053257 is a wasteful number, since it uses less digits than its factorization.

51544623053257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39617542.

The product of its (nonzero) digits is 15120000, while the sum is 52.

The spelling of 51544623053257 in words is "fifty-one trillion, five hundred forty-four billion, six hundred twenty-three million, fifty-three thousand, two hundred fifty-seven".