1981980000037 has 2 divisors, whose sum is σ = 1981980000038. Its totient is φ = 1981980000036.

The previous prime is 1981980000029. The next prime is 1981980000053. The reversal of 1981980000037 is 7300000891891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1277444718081 + 704535281956 = 1130241^2 + 839366^2 .

It is a cyclic number.

It is not a de Polignac number, because 1981980000037 - 2³ = 1981980000029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1981980000337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990990000018 + 990990000019.

It is an arithmetic number, because the mean of its divisors is an integer number (990990000019).

Almost surely, 2^{1981980000037} is an apocalyptic number.

It is an amenable number.

1981980000037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1981980000037 is an equidigital number, since it uses as much as digits as its factorization.

1981980000037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 46.

The spelling of 1981980000037 in words is "one trillion, nine hundred eighty-one billion, nine hundred eighty million, thirty-seven", and thus it is an aban number.