51267366017 has 4 divisors (see below), whose sum is σ = 58591275456. Its totient is φ = 43943456580.

The previous prime is 51267365977. The next prime is 51267366049. The reversal of 51267366017 is 71066376215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71066376215 = 5 ⋅14213275243.

It is a cyclic number.

It is not a de Polignac number, because 51267366017 - 2¹⁸ = 51267103873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51267366097) 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, 3661954709 + ... + 3661954722.

It is an arithmetic number, because the mean of its divisors is an integer number (14647818864).

Almost surely, 2^51267366017 is an apocalyptic number.

It is an amenable number.

51267366017 is a deficient number, since it is larger than the sum of its proper divisors (7323909439).

51267366017 is an equidigital number, since it uses as much as digits as its factorization.

51267366017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7323909438.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 51267366017 in words is "fifty-one billion, two hundred sixty-seven million, three hundred sixty-six thousand, seventeen".