51025924447991 has 2 divisors, whose sum is σ = 51025924447992. Its totient is φ = 51025924447990.

The previous prime is 51025924447943. The next prime is 51025924447999. The reversal of 51025924447991 is 19974442952015.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51025924447991 - 2³⁸ = 50751046541047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51025924447999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25512962223995 + 25512962223996.

It is an arithmetic number, because the mean of its divisors is an integer number (25512962223996).

Almost surely, 2^{51025924447991} is an apocalyptic number.

51025924447991 is a deficient number, since it is larger than the sum of its proper divisors (1).

51025924447991 is an equidigital number, since it uses as much as digits as its factorization.

51025924447991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32659200, while the sum is 62.

The spelling of 51025924447991 in words is "fifty-one trillion, twenty-five billion, nine hundred twenty-four million, four hundred forty-seven thousand, nine hundred ninety-one".