1851868536 has 32 divisors (see below), whose sum is σ = 5291053440. Its totient is φ = 529105248.

The previous prime is 1851868523. The next prime is 1851868541. The reversal of 1851868536 is 6358681581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5511346 + ... + 5511681.

It is an arithmetic number, because the mean of its divisors is an integer number (165345420).

Almost surely, 2^1851868536 is an apocalyptic number.

It is an amenable number.

1851868536 is an abundant number, since it is smaller than the sum of its proper divisors (3439184904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1851868536 is a wasteful number, since it uses less digits than its factorization.

1851868536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11023043 (or 11023039 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 51.

The square root of 1851868536 is about 43033.3421430407. The cubic root of 1851868536 is about 1228.0141874314.

The spelling of 1851868536 in words is "one billion, eight hundred fifty-one million, eight hundred sixty-eight thousand, five hundred thirty-six".