51694484850 has 144 divisors (see below), whose sum is σ = 151320300000. Its totient is φ = 12974204160.

The previous prime is 51694484839. The next prime is 51694484851. The reversal of 51694484850 is 5848449615.

51694484850 is a `hidden beast` number, since 51 + 69 + 4 + 484 + 8 + 50 = 666.

51694484850 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (51694484851) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 323901 + ... + 456399.

Almost surely, 2^51694484850 is an apocalyptic number.

51694484850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51694484850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75660150000).

51694484850 is an abundant number, since it is smaller than the sum of its proper divisors (99625815150).

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

51694484850 is a wasteful number, since it uses less digits than its factorization.

51694484850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132554 (or 132526 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 51694484850 in words is "fifty-one billion, six hundred ninety-four million, four hundred eighty-four thousand, eight hundred fifty".