1850016721 has 8 divisors (see below), whose sum is σ = 2238675840. Its totient is φ = 1492450368.

The previous prime is 1850016713. The next prime is 1850016743. The reversal of 1850016721 is 1276100581.

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 1850016721 - 2³ = 1850016713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1850014721) 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, 7773061 + ... + 7773298.

It is an arithmetic number, because the mean of its divisors is an integer number (279834480).

Almost surely, 2^1850016721 is an apocalyptic number.

It is an amenable number.

1850016721 is a deficient number, since it is larger than the sum of its proper divisors (388659119).

1850016721 is a wasteful number, since it uses less digits than its factorization.

1850016721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15546383.

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 1850016721 is about 43011.8207124507. The cubic root of 1850016721 is about 1227.6047246885.

The spelling of 1850016721 in words is "one billion, eight hundred fifty million, sixteen thousand, seven hundred twenty-one".