1978611411 has 8 divisors (see below), whose sum is σ = 3015026944. Its totient is φ = 1130635080.

The previous prime is 1978611377. The next prime is 1978611413. The reversal of 1978611411 is 1141168791.

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

It is not a de Polignac number, because 1978611411 - 2⁹ = 1978610899 is a prime.

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 1978611411.

It is not an unprimeable number, because it can be changed into a prime (1978611413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47109775 + ... + 47109816.

It is an arithmetic number, because the mean of its divisors is an integer number (376878368).

Almost surely, 2^1978611411 is an apocalyptic number.

1978611411 is a deficient number, since it is larger than the sum of its proper divisors (1036415533).

1978611411 is an equidigital number, since it uses as much as digits as its factorization.

1978611411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94219601.

The product of its digits is 12096, while the sum is 39.

The square root of 1978611411 is about 44481.5850774228. The cubic root of 1978611411 is about 1255.4136213294.

The spelling of 1978611411 in words is "one billion, nine hundred seventy-eight million, six hundred eleven thousand, four hundred eleven".