51663620214 has 96 divisors (see below), whose sum is σ = 124219330560. Its totient is φ = 15452467200.

The previous prime is 51663620171. The next prime is 51663620237. The reversal of 51663620214 is 41202636615.

51663620214 is a `hidden beast` number, since 5 + 1 + 6 + 6 + 3 + 620 + 21 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 446454 + ... + 550134.

It is an arithmetic number, because the mean of its divisors is an integer number (1293951360).

Almost surely, 2^51663620214 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51663620214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62109665280).

51663620214 is an abundant number, since it is smaller than the sum of its proper divisors (72555710346).

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

51663620214 is a wasteful number, since it uses less digits than its factorization.

51663620214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103786 (or 103783 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 51663620214 in words is "fifty-one billion, six hundred sixty-three million, six hundred twenty thousand, two hundred fourteen".