149819781005 has 54 divisors (see below), whose sum is σ = 191752648074. Its totient is φ = 112368860352.

The previous prime is 149819780933. The next prime is 149819781037. The reversal of 149819781005 is 500187918941.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 17244417124 + 132575363881 = 131318^2 + 364109^2 .

It is not a de Polignac number, because 149819781005 - 2⁸ = 149819780749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 1179683252 + ... + 1179683378.

Almost surely, 2^149819781005 is an apocalyptic number.

It is an amenable number.

149819781005 is a deficient number, since it is larger than the sum of its proper divisors (41932867069).

149819781005 is an frugal number, since it uses more digits than its factorization.

149819781005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 53.

The spelling of 149819781005 in words is "one hundred forty-nine billion, eight hundred nineteen million, seven hundred eighty-one thousand, five".