51267707257 has 8 divisors (see below), whose sum is σ = 55727372736. Its totient is φ = 46881755472.

The previous prime is 51267707251. The next prime is 51267707321. The reversal of 51267707257 is 75270776215.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51267707257 is a prime.

It is a super-3 number, since 3×51267707257³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51267707257.

It is not an unprimeable number, because it can be changed into a prime (51267707251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18426973 + ... + 18429754.

It is an arithmetic number, because the mean of its divisors is an integer number (6965921592).

Almost surely, 2^51267707257 is an apocalyptic number.

It is an amenable number.

51267707257 is a deficient number, since it is larger than the sum of its proper divisors (4459665479).

51267707257 is a wasteful number, since it uses less digits than its factorization.

51267707257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36856847.

The product of its (nonzero) digits is 1440600, while the sum is 49.

The spelling of 51267707257 in words is "fifty-one billion, two hundred sixty-seven million, seven hundred seven thousand, two hundred fifty-seven".