51800551779 has 16 divisors (see below), whose sum is σ = 69919472000. Its totient is φ = 34109095680.

The previous prime is 51800551681. The next prime is 51800551823. The reversal of 51800551779 is 97715500815.

It is a happy number.

51800551779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51800551779 - 2¹² = 51800547683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51800551679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33157 + ... + 323574.

It is an arithmetic number, because the mean of its divisors is an integer number (4369967000).

Almost surely, 2^51800551779 is an apocalyptic number.

51800551779 is a deficient number, since it is larger than the sum of its proper divisors (18118920221).

51800551779 is a wasteful number, since it uses less digits than its factorization.

51800551779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357330.

The product of its (nonzero) digits is 441000, while the sum is 48.

The spelling of 51800551779 in words is "fifty-one billion, eight hundred million, five hundred fifty-one thousand, seven hundred seventy-nine".