149639769889 has 9 divisors (see below), whose sum is σ = 150122930737. Its totient is φ = 149158162804.

The previous prime is 149639769887. The next prime is 149639769893. The reversal of 149639769889 is 988967936941.

The square root of 149639769889 is 386833.

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

It is not a de Polignac number, because 149639769889 - 2¹ = 149639769887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149639769887) 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, 227070642 + ... + 227071300.

Almost surely, 2^149639769889 is an apocalyptic number.

149639769889 is the 386833-rd square number.

149639769889 is the 193417-th centered octagonal number.

It is an amenable number.

149639769889 is a deficient number, since it is larger than the sum of its proper divisors (483160848).

149639769889 is an frugal number, since it uses more digits than its factorization.

149639769889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2492 (or 1246 counting only the distinct ones).

The product of its digits is 1269789696, while the sum is 79.

The spelling of 149639769889 in words is "one hundred forty-nine billion, six hundred thirty-nine million, seven hundred sixty-nine thousand, eight hundred eighty-nine".