1851854638852 has 24 divisors (see below), whose sum is σ = 3260763247392. Its totient is φ = 920208470400.

The previous prime is 1851854638849. The next prime is 1851854638873. The reversal of 1851854638852 is 2588364581581.

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, 21813327 + ... + 21898057.

It is an arithmetic number, because the mean of its divisors is an integer number (135865135308).

Almost surely, 2^{1851854638852} is an apocalyptic number.

It is an amenable number.

1851854638852 is a deficient number, since it is larger than the sum of its proper divisors (1408908608540).

1851854638852 is a wasteful number, since it uses less digits than its factorization.

1851854638852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118419 (or 118417 counting only the distinct ones).

The product of its digits is 73728000, while the sum is 64.

The spelling of 1851854638852 in words is "one trillion, eight hundred fifty-one billion, eight hundred fifty-four million, six hundred thirty-eight thousand, eight hundred fifty-two".