51405566000 has 160 divisors (see below), whose sum is σ = 126340770816. Its totient is φ = 20227200000.

The previous prime is 51405565963. The next prime is 51405566029. The reversal of 51405566000 is 66550415.

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, 34945265 + ... + 34946735.

Almost surely, 2^51405566000 is an apocalyptic number.

51405566000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51405566000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63170385408).

51405566000 is an abundant number, since it is smaller than the sum of its proper divisors (74935204816).

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

51405566000 is a wasteful number, since it uses less digits than its factorization.

51405566000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768 (or 1752 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 51405566000 in words is "fifty-one billion, four hundred five million, five hundred sixty-six thousand".