51898235556 has 12 divisors (see below), whose sum is σ = 121095882992. Its totient is φ = 17299411848.

The previous prime is 51898235497. The next prime is 51898235591. The reversal of 51898235556 is 65553289815.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 51898235496 and 51898235505.

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, 2162426470 + ... + 2162426493.

Almost surely, 2^51898235556 is an apocalyptic number.

It is an amenable number.

51898235556 is an abundant number, since it is smaller than the sum of its proper divisors (69197647436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51898235556 is a wasteful number, since it uses less digits than its factorization.

51898235556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4324852970 (or 4324852968 counting only the distinct ones).

The product of its digits is 12960000, while the sum is 57.

The spelling of 51898235556 in words is "fifty-one billion, eight hundred ninety-eight million, two hundred thirty-five thousand, five hundred fifty-six".