51555753860 has 96 divisors (see below), whose sum is σ = 119911545600. Its totient is φ = 18499041792.

The previous prime is 51555753853. The next prime is 51555753871. The reversal of 51555753860 is 6835755515.

It is a junction number, because it is equal to n+sod(n) for n = 51555753799 and 51555753808.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2213234 + ... + 2236406.

It is an arithmetic number, because the mean of its divisors is an integer number (1249078600).

Almost surely, 2^51555753860 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51555753860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59955772800).

51555753860 is an abundant number, since it is smaller than the sum of its proper divisors (68355791740).

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

51555753860 is a wasteful number, since it uses less digits than its factorization.

51555753860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23437 (or 23435 counting only the distinct ones).

The product of its (nonzero) digits is 3150000, while the sum is 50.

The spelling of 51555753860 in words is "fifty-one billion, five hundred fifty-five million, seven hundred fifty-three thousand, eight hundred sixty".