37678041781 has 2 divisors, whose sum is σ = 37678041782. Its totient is φ = 37678041780.

The previous prime is 37678041769. The next prime is 37678041803. The reversal of 37678041781 is 18714087673.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37570068900 + 107972881 = 193830^2 + 10391^2 .

It is an emirp because it is prime and its reverse (18714087673) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37678041781 - 2²⁷ = 37543824053 is a prime.

It is a super-2 number, since 2×37678041781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37678041581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18839020890 + 18839020891.

It is an arithmetic number, because the mean of its divisors is an integer number (18839020891).

Almost surely, 2^37678041781 is an apocalyptic number.

It is an amenable number.

37678041781 is a deficient number, since it is larger than the sum of its proper divisors (1).

37678041781 is an equidigital number, since it uses as much as digits as its factorization.

37678041781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1580544, while the sum is 52.

The spelling of 37678041781 in words is "thirty-seven billion, six hundred seventy-eight million, forty-one thousand, seven hundred eighty-one".