149961901809 has 8 divisors (see below), whose sum is σ = 199954730272. Its totient is φ = 99971837280.

The previous prime is 149961901723. The next prime is 149961901819. The reversal of 149961901809 is 908109169941.

149961901809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 149961901809 - 2⁷ = 149961901681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149961901819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560884 + ... + 783909.

It is an arithmetic number, because the mean of its divisors is an integer number (24994341284).

Almost surely, 2^149961901809 is an apocalyptic number.

It is an amenable number.

149961901809 is a deficient number, since it is larger than the sum of its proper divisors (49992828463).

149961901809 is a wasteful number, since it uses less digits than its factorization.

149961901809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381967.

The product of its (nonzero) digits is 1259712, while the sum is 57.

The spelling of 149961901809 in words is "one hundred forty-nine billion, nine hundred sixty-one million, nine hundred one thousand, eight hundred nine".