51744657251 has 16 divisors (see below), whose sum is σ = 61605895680. Its totient is φ = 42537376320.

The previous prime is 51744657241. The next prime is 51744657253. The reversal of 51744657251 is 15275644715.

It is not a de Polignac number, because 51744657251 - 2³⁴ = 34564788067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51744657196 and 51744657205.

It is not an unprimeable number, because it can be changed into a prime (51744657253) 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, 1510991 + ... + 1544856.

It is an arithmetic number, because the mean of its divisors is an integer number (3850368480).

Almost surely, 2^51744657251 is an apocalyptic number.

51744657251 is a deficient number, since it is larger than the sum of its proper divisors (9861238429).

51744657251 is a wasteful number, since it uses less digits than its factorization.

51744657251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3055954.

The product of its digits is 1176000, while the sum is 47.

The spelling of 51744657251 in words is "fifty-one billion, seven hundred forty-four million, six hundred fifty-seven thousand, two hundred fifty-one".