1801980951612 has 48 divisors (see below), whose sum is σ = 4212555508224. Its totient is φ = 599527440000.

The previous prime is 1801980951581. The next prime is 1801980951697. The reversal of 1801980951612 is 2161590891081.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35537037 + ... + 35587707.

It is an arithmetic number, because the mean of its divisors is an integer number (87761573088).

Almost surely, 2^{1801980951612} is an apocalyptic number.

1801980951612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1801980951612 is an abundant number, since it is smaller than the sum of its proper divisors (2410574556612).

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

1801980951612 is a wasteful number, since it uses less digits than its factorization.

1801980951612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56210 (or 56208 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 51.

The spelling of 1801980951612 in words is "one trillion, eight hundred one billion, nine hundred eighty million, nine hundred fifty-one thousand, six hundred twelve".