51550762667 has 4 divisors (see below), whose sum is σ = 51551631096. Its totient is φ = 51549894240.

The previous prime is 51550762649. The next prime is 51550762727. The reversal of 51550762667 is 76626705515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76626705515 = 5 ⋅15325341103.

It is a cyclic number.

It is not a de Polignac number, because 51550762667 - 2³⁰ = 50477020843 is a prime.

It is a super-2 number, since 2×51550762667² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51550762867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338078 + ... + 466259.

It is an arithmetic number, because the mean of its divisors is an integer number (12887907774).

Almost surely, 2^51550762667 is an apocalyptic number.

51550762667 is a deficient number, since it is larger than the sum of its proper divisors (868429).

51550762667 is an equidigital number, since it uses as much as digits as its factorization.

51550762667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868428.

The product of its (nonzero) digits is 2646000, while the sum is 50.

The spelling of 51550762667 in words is "fifty-one billion, five hundred fifty million, seven hundred sixty-two thousand, six hundred sixty-seven".