1851336493 has 8 divisors (see below), whose sum is σ = 1932993216. Its totient is φ = 1769776800.

The previous prime is 1851336479. The next prime is 1851336527. The reversal of 1851336493 is 3946331581.

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 1851336493 - 2¹³ = 1851328301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1851336433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16198 + ... + 62968.

It is an arithmetic number, because the mean of its divisors is an integer number (241624152).

Almost surely, 2^1851336493 is an apocalyptic number.

It is an amenable number.

1851336493 is a deficient number, since it is larger than the sum of its proper divisors (81656723).

1851336493 is a wasteful number, since it uses less digits than its factorization.

1851336493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48515.

The product of its digits is 233280, while the sum is 43.

The square root of 1851336493 is about 43027.1599457831. The cubic root of 1851336493 is about 1227.8965730832.

The spelling of 1851336493 in words is "one billion, eight hundred fifty-one million, three hundred thirty-six thousand, four hundred ninety-three".