51123727707 has 8 divisors (see below), whose sum is σ = 73408429584. Its totient is φ = 31460755488.

The previous prime is 51123727703. The next prime is 51123727729. The reversal of 51123727707 is 70772732115.

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

It is not a de Polignac number, because 51123727707 - 2² = 51123727703 is a prime.

It is a super-2 number, since 2×51123727707² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51123727703) 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, 655432368 + ... + 655432445.

It is an arithmetic number, because the mean of its divisors is an integer number (9176053698).

Almost surely, 2^51123727707 is an apocalyptic number.

51123727707 is a deficient number, since it is larger than the sum of its proper divisors (22284701877).

51123727707 is a wasteful number, since it uses less digits than its factorization.

51123727707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310864829.

The product of its (nonzero) digits is 144060, while the sum is 42.

The spelling of 51123727707 in words is "fifty-one billion, one hundred twenty-three million, seven hundred twenty-seven thousand, seven hundred seven".