1851740861 has 8 divisors (see below), whose sum is σ = 1961729280. Its totient is φ = 1741870528.

The previous prime is 1851740843. The next prime is 1851740867. The reversal of 1851740861 is 1680471581.

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 1851740861 - 2¹⁰ = 1851739837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1851740867) 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, 3860 + ... + 60978.

It is an arithmetic number, because the mean of its divisors is an integer number (245216160).

Almost surely, 2^1851740861 is an apocalyptic number.

It is an amenable number.

1851740861 is a deficient number, since it is larger than the sum of its proper divisors (109988419).

1851740861 is a wasteful number, since it uses less digits than its factorization.

1851740861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59043.

The product of its (nonzero) digits is 53760, while the sum is 41.

The square root of 1851740861 is about 43031.8586747075. The cubic root of 1851740861 is about 1227.9859654290.

The spelling of 1851740861 in words is "one billion, eight hundred fifty-one million, seven hundred forty thousand, eight hundred sixty-one".