51115603963 has 2 divisors, whose sum is σ = 51115603964. Its totient is φ = 51115603962.

The previous prime is 51115603909. The next prime is 51115603997. The reversal of 51115603963 is 36930651115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51115603963 - 2¹³ = 51115595771 is a prime.

It is a super-2 number, since 2×51115603963² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51115604963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25557801981 + 25557801982.

It is an arithmetic number, because the mean of its divisors is an integer number (25557801982).

Almost surely, 2^51115603963 is an apocalyptic number.

51115603963 is a deficient number, since it is larger than the sum of its proper divisors (1).

51115603963 is an equidigital number, since it uses as much as digits as its factorization.

51115603963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 40.

The spelling of 51115603963 in words is "fifty-one billion, one hundred fifteen million, six hundred three thousand, nine hundred sixty-three".