37881821899 has 2 divisors, whose sum is σ = 37881821900. Its totient is φ = 37881821898.

The previous prime is 37881821869. The next prime is 37881821963. The reversal of 37881821899 is 99812818873.

It is an a-pointer prime, because the next prime (37881821963) can be obtained adding 37881821899 to its sum of digits (64).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 37881821899 - 2⁷ = 37881821771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 37881821899.

It is not a weakly prime, because it can be changed into another prime (37881821849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18940910949 + 18940910950.

It is an arithmetic number, because the mean of its divisors is an integer number (18940910950).

Almost surely, 2^37881821899 is an apocalyptic number.

37881821899 is a deficient number, since it is larger than the sum of its proper divisors (1).

37881821899 is an equidigital number, since it uses as much as digits as its factorization.

37881821899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13934592, while the sum is 64.

The spelling of 37881821899 in words is "thirty-seven billion, eight hundred eighty-one million, eight hundred twenty-one thousand, eight hundred ninety-nine".