149205249509 has 8 divisors (see below), whose sum is σ = 149412130560. Its totient is φ = 148998510000.

The previous prime is 149205249491. The next prime is 149205249521. The reversal of 149205249509 is 905942502941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149205249509 - 2⁸ = 149205249253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149205249569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2168384 + ... + 2236134.

It is an arithmetic number, because the mean of its divisors is an integer number (18676516320).

Almost surely, 2^149205249509 is an apocalyptic number.

It is an amenable number.

149205249509 is a deficient number, since it is larger than the sum of its proper divisors (206881051).

149205249509 is a wasteful number, since it uses less digits than its factorization.

149205249509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70771.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 149205249509 in words is "one hundred forty-nine billion, two hundred five million, two hundred forty-nine thousand, five hundred nine".