149894478991 has 2 divisors, whose sum is σ = 149894478992. Its totient is φ = 149894478990.

The previous prime is 149894478977. The next prime is 149894479037. The reversal of 149894478991 is 199874498941.

149894478991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149894478991 - 2⁵ = 149894478959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149894473991) 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, 74947239495 + 74947239496.

It is an arithmetic number, because the mean of its divisors is an integer number (74947239496).

Almost surely, 2^149894478991 is an apocalyptic number.

149894478991 is a deficient number, since it is larger than the sum of its proper divisors (1).

149894478991 is an equidigital number, since it uses as much as digits as its factorization.

149894478991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188116992, while the sum is 73.

The spelling of 149894478991 in words is "one hundred forty-nine billion, eight hundred ninety-four million, four hundred seventy-eight thousand, nine hundred ninety-one".