51903774991 has 2 divisors, whose sum is σ = 51903774992. Its totient is φ = 51903774990.

The previous prime is 51903774943. The next prime is 51903775019. The reversal of 51903774991 is 19947730915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51903774991 - 2³³ = 43313840399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51903778991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25951887495 + 25951887496.

It is an arithmetic number, because the mean of its divisors is an integer number (25951887496).

Almost surely, 2^51903774991 is an apocalyptic number.

51903774991 is a deficient number, since it is larger than the sum of its proper divisors (1).

51903774991 is an equidigital number, since it uses as much as digits as its factorization.

51903774991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2143260, while the sum is 55.

The spelling of 51903774991 in words is "fifty-one billion, nine hundred three million, seven hundred seventy-four thousand, nine hundred ninety-one".