51881392602 has 144 divisors (see below), whose sum is σ = 128311511328. Its totient is φ = 15052141440.

The previous prime is 51881392601. The next prime is 51881392621. The reversal of 51881392602 is 20629318815.

51881392602 is a `hidden beast` number, since 5 + 1 + 8 + 8 + 1 + 39 + 2 + 602 = 666.

It is not an unprimeable number, because it can be changed into a prime (51881392601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8459077 + ... + 8465207.

It is an arithmetic number, because the mean of its divisors is an integer number (891052162).

Almost surely, 2^51881392602 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51881392602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64155755664).

51881392602 is an abundant number, since it is smaller than the sum of its proper divisors (76430118726).

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

51881392602 is a wasteful number, since it uses less digits than its factorization.

51881392602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6253 (or 6221 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 51881392602 in words is "fifty-one billion, eight hundred eighty-one million, three hundred ninety-two thousand, six hundred two".