51675402140 has 24 divisors (see below), whose sum is σ = 110297336352. Its totient is φ = 20331305280.

The previous prime is 51675402131. The next prime is 51675402157. The reversal of 51675402140 is 4120457615.

It is a self number, because there is not a number n which added to its sum of digits gives 51675402140.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21177224 + ... + 21179663.

It is an arithmetic number, because the mean of its divisors is an integer number (4595722348).

Almost surely, 2^51675402140 is an apocalyptic number.

It is an amenable number.

51675402140 is an abundant number, since it is smaller than the sum of its proper divisors (58621934212).

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

51675402140 is a wasteful number, since it uses less digits than its factorization.

51675402140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42356957 (or 42356955 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

Adding to 51675402140 its reverse (4120457615), we get a palindrome (55795859755).

The spelling of 51675402140 in words is "fifty-one billion, six hundred seventy-five million, four hundred two thousand, one hundred forty".