51381984707 has 2 divisors, whose sum is σ = 51381984708. Its totient is φ = 51381984706.

The previous prime is 51381984653. The next prime is 51381984727. The reversal of 51381984707 is 70748918315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51381984707 - 2²² = 51377790403 is a prime.

It is not a weakly prime, because it can be changed into another prime (51381984727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25690992353 + 25690992354.

It is an arithmetic number, because the mean of its divisors is an integer number (25690992354).

Almost surely, 2^51381984707 is an apocalyptic number.

51381984707 is a deficient number, since it is larger than the sum of its proper divisors (1).

51381984707 is an equidigital number, since it uses as much as digits as its factorization.

51381984707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 53.

The spelling of 51381984707 in words is "fifty-one billion, three hundred eighty-one million, nine hundred eighty-four thousand, seven hundred seven".