51240861792 has 84 divisors (see below), whose sum is σ = 151251547860. Its totient is φ = 17080279488.

The previous prime is 51240861787. The next prime is 51240861817. The reversal of 51240861792 is 29716804215.

51240861792 is a `hidden beast` number, since 5 + 1 + 24 + 0 + 8 + 617 + 9 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1074942 + ... + 1121597.

It is an arithmetic number, because the mean of its divisors is an integer number (1800613665).

Almost surely, 2^51240861792 is an apocalyptic number.

It is an amenable number.

51240861792 is an abundant number, since it is smaller than the sum of its proper divisors (100010686068).

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

51240861792 is an equidigital number, since it uses as much as digits as its factorization.

51240861792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196567 (or 2196544 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 51240861792 in words is "fifty-one billion, two hundred forty million, eight hundred sixty-one thousand, seven hundred ninety-two".