51648907899 has 8 divisors (see below), whose sum is σ = 70466727232. Its totient is φ = 33631846920.

The previous prime is 51648907837. The next prime is 51648907909. The reversal of 51648907899 is 99870984615.

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

It is not a de Polignac number, because 51648907899 - 2¹⁶ = 51648842363 is a prime.

It is a super-3 number, since 3×51648907899³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51648907399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200189437 + ... + 200189694.

It is an arithmetic number, because the mean of its divisors is an integer number (8808340904).

Almost surely, 2^51648907899 is an apocalyptic number.

51648907899 is a deficient number, since it is larger than the sum of its proper divisors (18817819333).

51648907899 is a wasteful number, since it uses less digits than its factorization.

51648907899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400379177.

The product of its (nonzero) digits is 39191040, while the sum is 66.

The spelling of 51648907899 in words is "fifty-one billion, six hundred forty-eight million, nine hundred seven thousand, eight hundred ninety-nine".