51345820357 has 8 divisors (see below), whose sum is σ = 55297858784. Its totient is φ = 47394119088.

The previous prime is 51345820313. The next prime is 51345820429. The reversal of 51345820357 is 75302854315.

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 51345820357 - 2¹⁹ = 51345296069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51345890357) 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, 295378 + ... + 435820.

It is an arithmetic number, because the mean of its divisors is an integer number (6912232348).

Almost surely, 2^51345820357 is an apocalyptic number.

It is an amenable number.

51345820357 is a deficient number, since it is larger than the sum of its proper divisors (3952038427).

51345820357 is a wasteful number, since it uses less digits than its factorization.

51345820357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168579.

The product of its (nonzero) digits is 504000, while the sum is 43.

The spelling of 51345820357 in words is "fifty-one billion, three hundred forty-five million, eight hundred twenty thousand, three hundred fifty-seven".