51555789503 has 2 divisors, whose sum is σ = 51555789504. Its totient is φ = 51555789502.

The previous prime is 51555789479. The next prime is 51555789557. The reversal of 51555789503 is 30598755515.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51555789503 - 2³² = 47260822207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51555789583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25777894751 + 25777894752.

It is an arithmetic number, because the mean of its divisors is an integer number (25777894752).

Almost surely, 2^51555789503 is an apocalyptic number.

51555789503 is a deficient number, since it is larger than the sum of its proper divisors (1).

51555789503 is an equidigital number, since it uses as much as digits as its factorization.

51555789503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4725000, while the sum is 53.

The spelling of 51555789503 in words is "fifty-one billion, five hundred fifty-five million, seven hundred eighty-nine thousand, five hundred three".