149345894881 has 2 divisors, whose sum is σ = 149345894882. Its totient is φ = 149345894880.

The previous prime is 149345894879. The next prime is 149345894977. The reversal of 149345894881 is 188498543941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78691470400 + 70654424481 = 280520^2 + 265809^2 .

It is a cyclic number.

It is not a de Polignac number, because 149345894881 - 2¹ = 149345894879 is a prime.

It is a super-2 number, since 2×149345894881² (a number of 23 digits) contains 22 as substring.

Together with 149345894879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (149345894861) 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, 74672947440 + 74672947441.

It is an arithmetic number, because the mean of its divisors is an integer number (74672947441).

Almost surely, 2^149345894881 is an apocalyptic number.

It is an amenable number.

149345894881 is a deficient number, since it is larger than the sum of its proper divisors (1).

149345894881 is an equidigital number, since it uses as much as digits as its factorization.

149345894881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39813120, while the sum is 64.

The spelling of 149345894881 in words is "one hundred forty-nine billion, three hundred forty-five million, eight hundred ninety-four thousand, eight hundred eighty-one".