37781481091 has 2 divisors, whose sum is σ = 37781481092. Its totient is φ = 37781481090.

The previous prime is 37781481083. The next prime is 37781481151. The reversal of 37781481091 is 19018418773.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 37781481091 - 2³ = 37781481083 is a prime.

It is not a weakly prime, because it can be changed into another prime (37781481011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18890740545 + 18890740546.

It is an arithmetic number, because the mean of its divisors is an integer number (18890740546).

Almost surely, 2^37781481091 is an apocalyptic number.

37781481091 is a deficient number, since it is larger than the sum of its proper divisors (1).

37781481091 is an equidigital number, since it uses as much as digits as its factorization.

37781481091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 49.

The spelling of 37781481091 in words is "thirty-seven billion, seven hundred eighty-one million, four hundred eighty-one thousand, ninety-one".