51534642761 has 16 divisors (see below), whose sum is σ = 63996456960. Its totient is φ = 40497751440.

The previous prime is 51534642751. The next prime is 51534642851. The reversal of 51534642761 is 16724643515.

It is a cyclic number.

It is not a de Polignac number, because 51534642761 - 2¹⁸ = 51534380617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51534642701) 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 in 15 ways as a sum of consecutive naturals, for example, 6245531 + ... + 6253776.

It is an arithmetic number, because the mean of its divisors is an integer number (3999778560).

Almost surely, 2^51534642761 is an apocalyptic number.

It is an amenable number.

51534642761 is a deficient number, since it is larger than the sum of its proper divisors (12461814199).

51534642761 is a wasteful number, since it uses less digits than its factorization.

51534642761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12499364.

The product of its digits is 604800, while the sum is 44.

The spelling of 51534642761 in words is "fifty-one billion, five hundred thirty-four million, six hundred forty-two thousand, seven hundred sixty-one".