51425387845157 has 8 divisors (see below), whose sum is σ = 54499509336600. Its totient is φ = 48356721762304.

The previous prime is 51425387845133. The next prime is 51425387845217. The reversal of 51425387845157 is 75154878352415.

It can be written as a sum of positive squares in 4 ways, for example, as 558836982916 + 50866550862241 = 747554^2 + 7132079^2 .

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 51425387845157 - 2¹⁶ = 51425387779621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51425387845093 and 51425387845102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51425387245157) 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, 1363832732 + ... + 1363870437.

It is an arithmetic number, because the mean of its divisors is an integer number (6812438667075).

Almost surely, 2^{51425387845157} is an apocalyptic number.

It is an amenable number.

51425387845157 is a deficient number, since it is larger than the sum of its proper divisors (3074121491443).

51425387845157 is a wasteful number, since it uses less digits than its factorization.

51425387845157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727704295.

The product of its digits is 188160000, while the sum is 65.

The spelling of 51425387845157 in words is "fifty-one trillion, four hundred twenty-five billion, three hundred eighty-seven million, eight hundred forty-five thousand, one hundred fifty-seven".