51902698853 has 2 divisors, whose sum is σ = 51902698854. Its totient is φ = 51902698852.

The previous prime is 51902698831. The next prime is 51902698871. The reversal of 51902698853 is 35889620915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37433736484 + 14468962369 = 193478^2 + 120287^2 .

It is a cyclic number.

It is not a de Polignac number, because 51902698853 - 2⁶ = 51902698789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51902698823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25951349426 + 25951349427.

It is an arithmetic number, because the mean of its divisors is an integer number (25951349427).

Almost surely, 2^51902698853 is an apocalyptic number.

It is an amenable number.

51902698853 is a deficient number, since it is larger than the sum of its proper divisors (1).

51902698853 is an equidigital number, since it uses as much as digits as its factorization.

51902698853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4665600, while the sum is 56.

The spelling of 51902698853 in words is "fifty-one billion, nine hundred two million, six hundred ninety-eight thousand, eight hundred fifty-three".