149184041581 has 2 divisors, whose sum is σ = 149184041582. Its totient is φ = 149184041580.

The previous prime is 149184041579. The next prime is 149184041599. The reversal of 149184041581 is 185140481941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130259637225 + 18924404356 = 360915^2 + 137566^2 .

It is a cyclic number.

It is not a de Polignac number, because 149184041581 - 2¹ = 149184041579 is a prime.

It is a super-2 number, since 2×149184041581² (a number of 23 digits) contains 22 as substring.

Together with 149184041579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149184047581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74592020790 + 74592020791.

It is an arithmetic number, because the mean of its divisors is an integer number (74592020791).

Almost surely, 2^149184041581 is an apocalyptic number.

It is an amenable number.

149184041581 is a deficient number, since it is larger than the sum of its proper divisors (1).

149184041581 is an equidigital number, since it uses as much as digits as its factorization.

149184041581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 184320, while the sum is 46.

The spelling of 149184041581 in words is "one hundred forty-nine billion, one hundred eighty-four million, forty-one thousand, five hundred eighty-one".