51128250538864 has 20 divisors (see below), whose sum is σ = 99180768982104. Its totient is φ = 25533213382208.

The previous prime is 51128250538847. The next prime is 51128250538873. The reversal of 51128250538864 is 46883505282115.

It is a happy number.

It is a super-2 number, since 2×51128250538864² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51128250538799 and 51128250538808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1931979307 + ... + 1932005770.

Almost surely, 2^{51128250538864} is an apocalyptic number.

It is an amenable number.

51128250538864 is a deficient number, since it is larger than the sum of its proper divisors (48052518443240).

51128250538864 is a wasteful number, since it uses less digits than its factorization.

51128250538864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3863985912 (or 3863985906 counting only the distinct ones).

The product of its (nonzero) digits is 18432000, while the sum is 58.

The spelling of 51128250538864 in words is "fifty-one trillion, one hundred twenty-eight billion, two hundred fifty million, five hundred thirty-eight thousand, eight hundred sixty-four".