149599472343665 has 4 divisors (see below), whose sum is σ = 179519366812404. Its totient is φ = 119679577874928.

The previous prime is 149599472343589. The next prime is 149599472343677. The reversal of 149599472343665 is 566343274995941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61630679971441 + 87968792372224 = 7850521^2 + 9379168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149599472343665 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14959947234362 + ... + 14959947234371.

It is an arithmetic number, because the mean of its divisors is an integer number (44879841703101).

Almost surely, 2^{149599472343665} is an apocalyptic number.

It is an amenable number.

149599472343665 is a deficient number, since it is larger than the sum of its proper divisors (29919894468739).

149599472343665 is an equidigital number, since it uses as much as digits as its factorization.

149599472343665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29919894468738.

The product of its digits is 5290790400, while the sum is 77.

The spelling of 149599472343665 in words is "one hundred forty-nine trillion, five hundred ninety-nine billion, four hundred seventy-two million, three hundred forty-three thousand, six hundred sixty-five".