1850181986397 has 8 divisors (see below), whose sum is σ = 2467118404800. Its totient is φ = 1233350112800.

The previous prime is 1850181986383. The next prime is 1850181986417. The reversal of 1850181986397 is 7936891810581.

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

It is a cyclic number.

It is not a de Polignac number, because 1850181986397 - 2¹⁰ = 1850181985373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1850181986327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26094897 + ... + 26165702.

It is an arithmetic number, because the mean of its divisors is an integer number (308389800600).

Almost surely, 2^{1850181986397} is an apocalyptic number.

It is an amenable number.

1850181986397 is a deficient number, since it is larger than the sum of its proper divisors (616936418403).

1850181986397 is a wasteful number, since it uses less digits than its factorization.

1850181986397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52272403.

The product of its (nonzero) digits is 26127360, while the sum is 66.

The spelling of 1850181986397 in words is "one trillion, eight hundred fifty billion, one hundred eighty-one million, nine hundred eighty-six thousand, three hundred ninety-seven".