1808851542 has 16 divisors (see below), whose sum is σ = 3621164400. Its totient is φ = 602373632.

The previous prime is 1808851531. The next prime is 1808851549. The reversal of 1808851542 is 2451588081.

It is a junction number, because it is equal to n+sod(n) for n = 1808851494 and 1808851503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808851549) 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, 137403 + ... + 149990.

It is an arithmetic number, because the mean of its divisors is an integer number (226322775).

Almost surely, 2^1808851542 is an apocalyptic number.

1808851542 is an abundant number, since it is smaller than the sum of its proper divisors (1812312858).

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

1808851542 is a wasteful number, since it uses less digits than its factorization.

1808851542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288447.

The product of its (nonzero) digits is 102400, while the sum is 42.

The square root of 1808851542 is about 42530.5953638084. The cubic root of 1808851542 is about 1218.4310975852.

The spelling of 1808851542 in words is "one billion, eight hundred eight million, eight hundred fifty-one thousand, five hundred forty-two".