1980180001802 has 8 divisors (see below), whose sum is σ = 2975115469476. Its totient is φ = 988474845312.

The previous prime is 1980180001759. The next prime is 1980180001819. The reversal of 1980180001802 is 2081000810891.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1136208896761 + 843971105041 = 1065931^2 + 918679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1980180001802² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 807576263 + ... + 807578714.

Almost surely, 2^{1980180001802} is an apocalyptic number.

1980180001802 is a deficient number, since it is larger than the sum of its proper divisors (994935467674).

1980180001802 is a wasteful number, since it uses less digits than its factorization.

1980180001802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615155592.

The product of its (nonzero) digits is 9216, while the sum is 38.

The spelling of 1980180001802 in words is "one trillion, nine hundred eighty billion, one hundred eighty million, one thousand, eight hundred two".