1850138361 has 8 divisors (see below), whose sum is σ = 2740945760. Its totient is φ = 1233425556.

The previous prime is 1850138359. The next prime is 1850138369. The reversal of 1850138361 is 1638310581.

1850138361 is a `hidden beast` number, since 18 + 501 + 3 + 83 + 61 = 666.

It is not a de Polignac number, because 1850138361 - 2¹ = 1850138359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1850138369) 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, 34261795 + ... + 34261848.

It is an arithmetic number, because the mean of its divisors is an integer number (342618220).

Almost surely, 2^1850138361 is an apocalyptic number.

It is an amenable number.

1850138361 is a deficient number, since it is larger than the sum of its proper divisors (890807399).

1850138361 is an equidigital number, since it uses as much as digits as its factorization.

1850138361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68523652 (or 68523646 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1850138361 is about 43013.2347190955. The cubic root of 1850138361 is about 1227.6316294122.

The spelling of 1850138361 in words is "one billion, eight hundred fifty million, one hundred thirty-eight thousand, three hundred sixty-one".