2371128783409 has 3 divisors (see below), whose sum is σ = 2371130323257. Its totient is φ = 2371127243562.

The previous prime is 2371128783407. The next prime is 2371128783433. The reversal of 2371128783409 is 9043878211732.

The square root of 2371128783409 is 1539847.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2371128783409 - 2¹ = 2371128783407 is a prime.

It is a super-2 number, since 2×2371128783409² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2371128783409.

It is not an unprimeable number, because it can be changed into a prime (2371128783407) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 769924 + ... + 2309770.

It is an arithmetic number, because the mean of its divisors is an integer number (790376774419).

Almost surely, 2^{2371128783409} is an apocalyptic number.

2371128783409 is the 1539847-th square number.

2371128783409 is the 769924-th centered octagonal number.

It is an amenable number.

2371128783409 is a deficient number, since it is larger than the sum of its proper divisors (1539848).

2371128783409 is an frugal number, since it uses more digits than its factorization.

2371128783409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079694 (or 1539847 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 2371128783409 in words is "two trillion, three hundred seventy-one billion, one hundred twenty-eight million, seven hundred eighty-three thousand, four hundred nine".