1780168449 has 4 divisors (see below), whose sum is σ = 2373557936. Its totient is φ = 1186778964.

The previous prime is 1780168441. The next prime is 1780168471. The reversal of 1780168449 is 9448610871.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1780168449 - 2³ = 1780168441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1780168398 and 1780168407.

It is not an unprimeable number, because it can be changed into a prime (1780168441) 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, 296694739 + ... + 296694744.

It is an arithmetic number, because the mean of its divisors is an integer number (593389484).

Almost surely, 2^1780168449 is an apocalyptic number.

It is an amenable number.

1780168449 is a deficient number, since it is larger than the sum of its proper divisors (593389487).

1780168449 is an equidigital number, since it uses as much as digits as its factorization.

1780168449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593389486.

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 1780168449 is about 42192.0424843358. The cubic root of 1780168449 is about 1211.9565025671.

The spelling of 1780168449 in words is "one billion, seven hundred eighty million, one hundred sixty-eight thousand, four hundred forty-nine".