51140780729 has 8 divisors (see below), whose sum is σ = 51253332480. Its totient is φ = 51028338816.

The previous prime is 51140780711. The next prime is 51140780759. The reversal of 51140780729 is 92708704115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51140780729 - 2¹⁶ = 51140715193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51140780729.

It is not an unprimeable number, because it can be changed into a prime (51140780759) 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 7 ways as a sum of consecutive naturals, for example, 942044 + ... + 994850.

It is an arithmetic number, because the mean of its divisors is an integer number (6406666560).

Almost surely, 2^51140780729 is an apocalyptic number.

It is an amenable number.

51140780729 is a deficient number, since it is larger than the sum of its proper divisors (112551751).

51140780729 is a wasteful number, since it uses less digits than its factorization.

51140780729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54919.

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 51140780729 in words is "fifty-one billion, one hundred forty million, seven hundred eighty thousand, seven hundred twenty-nine".