51643272523 has 2 divisors, whose sum is σ = 51643272524. Its totient is φ = 51643272522.

The previous prime is 51643272517. The next prime is 51643272547. The reversal of 51643272523 is 32527234615.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51643272523 is a prime.

It is not a weakly prime, because it can be changed into another prime (51643272223) 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 as a sum of consecutive naturals, namely, 25821636261 + 25821636262.

It is an arithmetic number, because the mean of its divisors is an integer number (25821636262).

Almost surely, 2^51643272523 is an apocalyptic number.

51643272523 is a deficient number, since it is larger than the sum of its proper divisors (1).

51643272523 is an equidigital number, since it uses as much as digits as its factorization.

51643272523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 40.

The spelling of 51643272523 in words is "fifty-one billion, six hundred forty-three million, two hundred seventy-two thousand, five hundred twenty-three".