37478213881 has 2 divisors, whose sum is σ = 37478213882. Its totient is φ = 37478213880.

The previous prime is 37478213831. The next prime is 37478213893. The reversal of 37478213881 is 18831287473.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32788155625 + 4690058256 = 181075^2 + 68484^2 .

It is a cyclic number.

It is not a de Polignac number, because 37478213881 - 2¹³ = 37478205689 is a prime.

It is a super-2 number, since 2×37478213881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (37478213831) 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, 18739106940 + 18739106941.

It is an arithmetic number, because the mean of its divisors is an integer number (18739106941).

Almost surely, 2^37478213881 is an apocalyptic number.

It is an amenable number.

37478213881 is a deficient number, since it is larger than the sum of its proper divisors (1).

37478213881 is an equidigital number, since it uses as much as digits as its factorization.

37478213881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1806336, while the sum is 52.

The spelling of 37478213881 in words is "thirty-seven billion, four hundred seventy-eight million, two hundred thirteen thousand, eight hundred eighty-one".