51205665624463 has 16 divisors (see below), whose sum is σ = 59768205502464. Its totient is φ = 42955059513600.

The previous prime is 51205665624439. The next prime is 51205665624467. The reversal of 51205665624463 is 36442656650215.

51205665624463 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51205665624463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51205665624467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5492863 + ... + 11514463.

It is an arithmetic number, because the mean of its divisors is an integer number (3735512843904).

Almost surely, 2^{51205665624463} is an apocalyptic number.

51205665624463 is a deficient number, since it is larger than the sum of its proper divisors (8562539878001).

51205665624463 is a wasteful number, since it uses less digits than its factorization.

51205665624463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6047502.

The product of its (nonzero) digits is 31104000, while the sum is 55.

The spelling of 51205665624463 in words is "fifty-one trillion, two hundred five billion, six hundred sixty-five million, six hundred twenty-four thousand, four hundred sixty-three".