51806935960 has 256 divisors, whose sum is σ = 134637552000. Its totient is φ = 17783193600.

The previous prime is 51806935927. The next prime is 51806935981. The reversal of 51806935960 is 6953960815.

It is a super-2 number, since 2×51806935960² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 51806935898 and 51806935907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 192590706 + ... + 192590974.

Almost surely, 2^51806935960 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 51806935960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67318776000).

51806935960 is an abundant number, since it is smaller than the sum of its proper divisors (82830616040).

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

51806935960 is a wasteful number, since it uses less digits than its factorization.

51806935960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 52.

The spelling of 51806935960 in words is "fifty-one billion, eight hundred six million, nine hundred thirty-five thousand, nine hundred sixty".