51755021445 has 32 divisors (see below), whose sum is σ = 83304748800. Its totient is φ = 27437253120.

The previous prime is 51755021441. The next prime is 51755021449. The reversal of 51755021445 is 54412055715.

It is an interprime number because it is at equal distance from previous prime (51755021441) and next prime (51755021449).

It is not a de Polignac number, because 51755021445 - 2² = 51755021441 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51755021441) 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 31 ways as a sum of consecutive naturals, for example, 9361272 + ... + 9366798.

It is an arithmetic number, because the mean of its divisors is an integer number (2603273400).

Almost surely, 2^51755021445 is an apocalyptic number.

It is an amenable number.

51755021445 is a deficient number, since it is larger than the sum of its proper divisors (31549727355).

51755021445 is a wasteful number, since it uses less digits than its factorization.

51755021445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9165.

The product of its (nonzero) digits is 140000, while the sum is 39.

The spelling of 51755021445 in words is "fifty-one billion, seven hundred fifty-five million, twenty-one thousand, four hundred forty-five".