149701669569 has 9 divisors (see below), whose sum is σ = 216237421569. Its totient is φ = 99800339220.

The previous prime is 149701669531. The next prime is 149701669609. The reversal of 149701669569 is 965966107941.

The square root of 149701669569 is 386913.

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

149701669569 is a `hidden beast` number, since 1 + 4 + 9 + 7 + 0 + 1 + 6 + 69 + 569 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 149701669569 - 2⁹ = 149701669057 is a prime.

It is a super-2 number, since 2×149701669569² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149701669669) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1096254 + ... + 1225224.

Almost surely, 2^149701669569 is an apocalyptic number.

149701669569 is the 386913-rd square number.

149701669569 is the 193457-th centered octagonal number.

It is an amenable number.

149701669569 is a deficient number, since it is larger than the sum of its proper divisors (66535752000).

149701669569 is an frugal number, since it uses more digits than its factorization.

149701669569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257948 (or 128974 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 63.

The spelling of 149701669569 in words is "one hundred forty-nine billion, seven hundred one million, six hundred sixty-nine thousand, five hundred sixty-nine".