51662251117 has 8 divisors (see below), whose sum is σ = 52124846616. Its totient is φ = 51201540672.

The previous prime is 51662251097. The next prime is 51662251153. The reversal of 51662251117 is 71115226615.

51662251117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14157668196 + 37504582921 = 118986^2 + 193661^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51662251117 - 2⁷ = 51662250989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51662251217) 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, 416178 + ... + 525859.

It is an arithmetic number, because the mean of its divisors is an integer number (6515605827).

Almost surely, 2^51662251117 is an apocalyptic number.

It is an amenable number.

51662251117 is a deficient number, since it is larger than the sum of its proper divisors (462595499).

51662251117 is a wasteful number, since it uses less digits than its factorization.

51662251117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942527.

The product of its digits is 25200, while the sum is 37.

The spelling of 51662251117 in words is "fifty-one billion, six hundred sixty-two million, two hundred fifty-one thousand, one hundred seventeen".