149744371669 has 4 divisors (see below), whose sum is σ = 149939098540. Its totient is φ = 149549644800.

The previous prime is 149744371639. The next prime is 149744371723. The reversal of 149744371669 is 966173447941.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20081724100 + 129662647569 = 141710^2 + 360087^2 .

It is a cyclic number.

It is not a de Polignac number, because 149744371669 - 2¹⁵ = 149744338901 is a prime.

It is a super-2 number, since 2×149744371669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149744371639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97362282 + ... + 97363819.

It is an arithmetic number, because the mean of its divisors is an integer number (37484774635).

Almost surely, 2^149744371669 is an apocalyptic number.

It is an amenable number.

149744371669 is a deficient number, since it is larger than the sum of its proper divisors (194726871).

149744371669 is an equidigital number, since it uses as much as digits as its factorization.

149744371669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194726870.

The product of its digits is 27433728, while the sum is 61.

The spelling of 149744371669 in words is "one hundred forty-nine billion, seven hundred forty-four million, three hundred seventy-one thousand, six hundred sixty-nine".