1772397942149 has 4 divisors (see below), whose sum is σ = 1772562231180. Its totient is φ = 1772233653120.

The previous prime is 1772397942121. The next prime is 1772397942157. The reversal of 1772397942149 is 9412497932771.

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 963819318049 + 808578624100 = 981743^2 + 899210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1772397942149 - 2¹² = 1772397938053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1772397942169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82128332 + ... + 82149909.

It is an arithmetic number, because the mean of its divisors is an integer number (443140557795).

Almost surely, 2^{1772397942149} is an apocalyptic number.

It is an amenable number.

1772397942149 is a deficient number, since it is larger than the sum of its proper divisors (164289031).

1772397942149 is a wasteful number, since it uses less digits than its factorization.

1772397942149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164289030.

The product of its digits is 48009024, while the sum is 65.

The spelling of 1772397942149 in words is "one trillion, seven hundred seventy-two billion, three hundred ninety-seven million, nine hundred forty-two thousand, one hundred forty-nine".