51756635479 has 2 divisors, whose sum is σ = 51756635480. Its totient is φ = 51756635478.

The previous prime is 51756635467. The next prime is 51756635563. The reversal of 51756635479 is 97453665715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51756635479 - 2²¹ = 51754538327 is a prime.

It is a super-2 number, since 2×51756635479² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51756635429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25878317739 + 25878317740.

It is an arithmetic number, because the mean of its divisors is an integer number (25878317740).

Almost surely, 2^51756635479 is an apocalyptic number.

51756635479 is a deficient number, since it is larger than the sum of its proper divisors (1).

51756635479 is an equidigital number, since it uses as much as digits as its factorization.

51756635479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814000, while the sum is 58.

The spelling of 51756635479 in words is "fifty-one billion, seven hundred fifty-six million, six hundred thirty-five thousand, four hundred seventy-nine".