149661433321 has 9 divisors (see below), whose sum is σ = 150302091261. Its totient is φ = 149023499532.

The previous prime is 149661433303. The next prime is 149661433331. The reversal of 149661433321 is 123334166941.

It is a happy number.

The square root of 149661433321 is 386861.

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

It is not a de Polignac number, because 149661433321 - 2⁵ = 149661433289 is a prime.

It is a super-2 number, since 2×149661433321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149661433331) 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, 109480980 + ... + 109482346.

Almost surely, 2^149661433321 is an apocalyptic number.

149661433321 is the 386861-st square number.

149661433321 is the 193431-st centered octagonal number.

It is an amenable number.

149661433321 is a deficient number, since it is larger than the sum of its proper divisors (640657940).

149661433321 is an frugal number, since it uses more digits than its factorization.

149661433321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300 (or 1650 counting only the distinct ones).

The product of its digits is 279936, while the sum is 43.

The spelling of 149661433321 in words is "one hundred forty-nine billion, six hundred sixty-one million, four hundred thirty-three thousand, three hundred twenty-one".