51345561801018 has 32 divisors (see below), whose sum is σ = 105810098796864. Its totient is φ = 16598371571712.

The previous prime is 51345561800999. The next prime is 51345561801029. The reversal of 51345561801018 is 81010816554315.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376619655 + ... + 376755962.

It is an arithmetic number, because the mean of its divisors is an integer number (3306565587402).

Almost surely, 2^{51345561801018} is an apocalyptic number.

51345561801018 is an abundant number, since it is smaller than the sum of its proper divisors (54464536995846).

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

51345561801018 is a wasteful number, since it uses less digits than its factorization.

51345561801018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753375966.

The product of its (nonzero) digits is 576000, while the sum is 48.

The spelling of 51345561801018 in words is "fifty-one trillion, three hundred forty-five billion, five hundred sixty-one million, eight hundred one thousand, eighteen".