51805698047 has 2 divisors, whose sum is σ = 51805698048. Its totient is φ = 51805698046.

The previous prime is 51805698029. The next prime is 51805698089. The reversal of 51805698047 is 74089650815.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51805698047 - 2²⁸ = 51537262591 is a prime.

It is a super-2 number, since 2×51805698047² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51805698047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51805692047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25902849023 + 25902849024.

It is an arithmetic number, because the mean of its divisors is an integer number (25902849024).

Almost surely, 2^51805698047 is an apocalyptic number.

51805698047 is a deficient number, since it is larger than the sum of its proper divisors (1).

51805698047 is an equidigital number, since it uses as much as digits as its factorization.

51805698047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 51805698047 in words is "fifty-one billion, eight hundred five million, six hundred ninety-eight thousand, forty-seven".