51898372556 has 12 divisors (see below), whose sum is σ = 91114186800. Its totient is φ = 25865747760.

The previous prime is 51898372553. The next prime is 51898372577. The reversal of 51898372556 is 65527389815.

It is a happy number.

It is a super-2 number, since 2×51898372556² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51898372495 and 51898372504.

It is not an unprimeable number, because it can be changed into a prime (51898372553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20858231 + ... + 20860718.

It is an arithmetic number, because the mean of its divisors is an integer number (7592848900).

Almost surely, 2^51898372556 is an apocalyptic number.

It is an amenable number.

51898372556 is a deficient number, since it is larger than the sum of its proper divisors (39215814244).

51898372556 is a wasteful number, since it uses less digits than its factorization.

51898372556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41719264 (or 41719262 counting only the distinct ones).

The product of its digits is 18144000, while the sum is 59.

The spelling of 51898372556 in words is "fifty-one billion, eight hundred ninety-eight million, three hundred seventy-two thousand, five hundred fifty-six".