1851330840738 has 16 divisors (see below), whose sum is σ = 3897538612320. Its totient is φ = 584630791776.

The previous prime is 1851330840721. The next prime is 1851330840781. The reversal of 1851330840738 is 8370480331581.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8119871995 + ... + 8119872222.

It is an arithmetic number, because the mean of its divisors is an integer number (243596163270).

Almost surely, 2^{1851330840738} is an apocalyptic number.

1851330840738 is an abundant number, since it is smaller than the sum of its proper divisors (2046207771582).

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

1851330840738 is a wasteful number, since it uses less digits than its factorization.

1851330840738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16239744241.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 1851330840738 in words is "one trillion, eight hundred fifty-one billion, three hundred thirty million, eight hundred forty thousand, seven hundred thirty-eight".