1802156533944 has 64 divisors (see below), whose sum is σ = 4852535415840. Its totient is φ = 554443929600.

The previous prime is 1802156533937. The next prime is 1802156533949. The reversal of 1802156533944 is 4493356512081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1802156533949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2325244 + ... + 3001844.

Almost surely, 2^{1802156533944} is an apocalyptic number.

It is an amenable number.

1802156533944 is an abundant number, since it is smaller than the sum of its proper divisors (3050378881896).

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

1802156533944 is a wasteful number, since it uses less digits than its factorization.

1802156533944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685160 (or 685156 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 1802156533944 in words is "one trillion, eight hundred two billion, one hundred fifty-six million, five hundred thirty-three thousand, nine hundred forty-four".