51284809820934 has 48 divisors (see below), whose sum is σ = 111306150914400. Its totient is φ = 17065851828480.

The previous prime is 51284809820911. The next prime is 51284809820939. The reversal of 51284809820934 is 43902890848215.

51284809820934 is a `hidden beast` number, since 5 + 12 + 8 + 480 + 98 + 20 + 9 + 34 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51284809820939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 474537264 + ... + 474645324.

It is an arithmetic number, because the mean of its divisors is an integer number (2318878144050).

Almost surely, 2^{51284809820934} is an apocalyptic number.

51284809820934 is an abundant number, since it is smaller than the sum of its proper divisors (60021341093466).

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

51284809820934 is a wasteful number, since it uses less digits than its factorization.

51284809820934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152685 (or 152682 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 63.

The spelling of 51284809820934 in words is "fifty-one trillion, two hundred eighty-four billion, eight hundred nine million, eight hundred twenty thousand, nine hundred thirty-four".