51205140402425 has 12 divisors (see below), whose sum is σ = 63654309562476. Its totient is φ = 40860928152000.

The previous prime is 51205140402389. The next prime is 51205140402467. The reversal of 51205140402425 is 52420404150215.

It can be written as a sum of positive squares in 6 ways, for example, as 1976127439504 + 49229012962921 = 1405748^2 + 7016339^2 .

It is not a de Polignac number, because 51205140402425 - 2¹⁸ = 51205140140281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2579594126 + ... + 2579613975.

It is an arithmetic number, because the mean of its divisors is an integer number (5304525796873).

Almost surely, 2^{51205140402425} is an apocalyptic number.

It is an amenable number.

51205140402425 is a deficient number, since it is larger than the sum of its proper divisors (12449169160051).

51205140402425 is a wasteful number, since it uses less digits than its factorization.

51205140402425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5159208508 (or 5159208503 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

The spelling of 51205140402425 in words is "fifty-one trillion, two hundred five billion, one hundred forty million, four hundred two thousand, four hundred twenty-five".