149554678729 has 3 divisors (see below), whose sum is σ = 149555065453. Its totient is φ = 149554292006.

The previous prime is 149554678709. The next prime is 149554678759. The reversal of 149554678729 is 927876455941.

The square root of 149554678729 is 386723.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 149554678729 - 2²³ = 149546290121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149554678709) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 193362 + ... + 580084.

Almost surely, 2^149554678729 is an apocalyptic number.

149554678729 is the 386723-rd square number.

149554678729 is the 193362-nd centered octagonal number.

It is an amenable number.

149554678729 is a deficient number, since it is larger than the sum of its proper divisors (386724).

149554678729 is an frugal number, since it uses more digits than its factorization.

149554678729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773446 (or 386723 counting only the distinct ones).

The product of its digits is 152409600, while the sum is 67.

The spelling of 149554678729 in words is "one hundred forty-nine billion, five hundred fifty-four million, six hundred seventy-eight thousand, seven hundred twenty-nine".