51984029540 has 24 divisors (see below), whose sum is σ = 109174575552. Its totient is φ = 20792066400.

The previous prime is 51984029533. The next prime is 51984029557. The reversal of 51984029540 is 4592048915.

It is a happy number.

It is a super-2 number, since 2×51984029540² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 201707 + ... + 380333.

It is an arithmetic number, because the mean of its divisors is an integer number (4548940648).

Almost surely, 2^51984029540 is an apocalyptic number.

It is an amenable number.

51984029540 is an abundant number, since it is smaller than the sum of its proper divisors (57190546012).

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

51984029540 is a wasteful number, since it uses less digits than its factorization.

51984029540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193187 (or 193185 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 51984029540 in words is "fifty-one billion, nine hundred eighty-four million, twenty-nine thousand, five hundred forty".