51563783700 has 216 divisors, whose sum is σ = 189880201056. Its totient is φ = 11538720000.

The previous prime is 51563783693. The next prime is 51563783759. The reversal of 51563783700 is 738736515.

51563783700 is a `hidden beast` number, since 5 + 1 + 5 + 637 + 8 + 3 + 7 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 71626 + ... + 329025.

Almost surely, 2^51563783700 is an apocalyptic number.

51563783700 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 51563783700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94940100528).

51563783700 is an abundant number, since it is smaller than the sum of its proper divisors (138316417356).

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

51563783700 is a wasteful number, since it uses less digits than its factorization.

51563783700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400695 (or 400685 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

It can be divided in two parts, 5156378 and 3700, that added together give a triangular number (5160078 = T₃₂₁₂).

The spelling of 51563783700 in words is "fifty-one billion, five hundred sixty-three million, seven hundred eighty-three thousand, seven hundred".