51246131195905 has 4 divisors (see below), whose sum is σ = 61495357435092. Its totient is φ = 40996904956720.

The previous prime is 51246131195899. The next prime is 51246131195921. The reversal of 51246131195905 is 50959113164215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38286678390129 + 12959452805776 = 6187623^2 + 3599924^2 .

It is not a de Polignac number, because 51246131195905 - 2⁵ = 51246131195873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5124613119586 + ... + 5124613119595.

It is an arithmetic number, because the mean of its divisors is an integer number (15373839358773).

Almost surely, 2^{51246131195905} is an apocalyptic number.

It is an amenable number.

51246131195905 is a deficient number, since it is larger than the sum of its proper divisors (10249226239187).

51246131195905 is a wasteful number, since it uses less digits than its factorization.

51246131195905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10249226239186.

The product of its (nonzero) digits is 1458000, while the sum is 52.

The spelling of 51246131195905 in words is "fifty-one trillion, two hundred forty-six billion, one hundred thirty-one million, one hundred ninety-five thousand, nine hundred five".