51642854208 has 336 divisors, whose sum is σ = 167580340480. Its totient is φ = 15583518720.

The previous prime is 51642854203. The next prime is 51642854227. The reversal of 51642854208 is 80245824615.

51642854208 is a `hidden beast` number, since 5 + 16 + 428 + 5 + 4 + 208 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51642854203) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76734960 + ... + 76735632.

Almost surely, 2^51642854208 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 51642854208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83790170240).

51642854208 is an abundant number, since it is smaller than the sum of its proper divisors (115937486272).

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

51642854208 is a wasteful number, since it uses less digits than its factorization.

51642854208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083 (or 1056 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 51642854208 in words is "fifty-one billion, six hundred forty-two million, eight hundred fifty-four thousand, two hundred eight".