1901997288365 has 16 divisors (see below), whose sum is σ = 2338185104640. Its totient is φ = 1484409406080.

The previous prime is 1901997288313. The next prime is 1901997288383. The reversal of 1901997288365 is 5638827991091.

It is a happy number.

It is not a de Polignac number, because 1901997288365 - 2²² = 1901993094061 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1901997288295 and 1901997288304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3938816 + ... + 4395254.

It is an arithmetic number, because the mean of its divisors is an integer number (146136569040).

Almost surely, 2^{1901997288365} is an apocalyptic number.

It is an amenable number.

1901997288365 is a deficient number, since it is larger than the sum of its proper divisors (436187816275).

1901997288365 is a wasteful number, since it uses less digits than its factorization.

1901997288365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476812.

The product of its (nonzero) digits is 58786560, while the sum is 68.

The spelling of 1901997288365 in words is "one trillion, nine hundred one billion, nine hundred ninety-seven million, two hundred eighty-eight thousand, three hundred sixty-five".