51051985600 has 168 divisors, whose sum is σ = 156617261568. Its totient is φ = 15912268800.

The previous prime is 51051985483. The next prime is 51051985619. The reversal of 51051985600 is 658915015.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83992 + ... + 330391.

Almost surely, 2^51051985600 is an apocalyptic number.

51051985600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51051985600 is an abundant number, since it is smaller than the sum of its proper divisors (105565275968).

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

51051985600 is a wasteful number, since it uses less digits than its factorization.

51051985600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414423 (or 414408 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 40.

The spelling of 51051985600 in words is "fifty-one billion, fifty-one million, nine hundred eighty-five thousand, six hundred".