149008667823 has 20 divisors (see below), whose sum is σ = 222668526960. Its totient is φ = 99305492832.

The previous prime is 149008667779. The next prime is 149008667827. The reversal of 149008667823 is 328766800941.

149008667823 is a `hidden beast` number, since 1 + 490 + 0 + 8 + 66 + 78 + 23 = 666.

It is not a de Polignac number, because 149008667823 - 2²⁰ = 149007619247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149008667823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149008667827) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 69315 + ... + 550292.

It is an arithmetic number, because the mean of its divisors is an integer number (11133426348).

Almost surely, 2^149008667823 is an apocalyptic number.

149008667823 is a deficient number, since it is larger than the sum of its proper divisors (73659859137).

149008667823 is an equidigital number, since it uses as much as digits as its factorization.

149008667823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622588 (or 622579 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 149008667823 in words is "one hundred forty-nine billion, eight million, six hundred sixty-seven thousand, eight hundred twenty-three".