51662074165643 has 2 divisors, whose sum is σ = 51662074165644. Its totient is φ = 51662074165642.

The previous prime is 51662074165631. The next prime is 51662074165657. The reversal of 51662074165643 is 34656147026615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51662074165643 - 2²⁴ = 51662057388427 is a prime.

It is not a weakly prime, because it can be changed into another prime (51662074125643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25831037082821 + 25831037082822.

It is an arithmetic number, because the mean of its divisors is an integer number (25831037082822).

Almost surely, 2^{51662074165643} is an apocalyptic number.

51662074165643 is a deficient number, since it is larger than the sum of its proper divisors (1).

51662074165643 is an equidigital number, since it uses as much as digits as its factorization.

51662074165643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21772800, while the sum is 56.

The spelling of 51662074165643 in words is "fifty-one trillion, six hundred sixty-two billion, seventy-four million, one hundred sixty-five thousand, six hundred forty-three".