1978419711 has 16 divisors (see below), whose sum is σ = 2710479200. Its totient is φ = 1282687488.

The previous prime is 1978419697. The next prime is 1978419713. The reversal of 1978419711 is 1179148791.

It is not a de Polignac number, because 1978419711 - 2¹⁸ = 1978157567 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 (1978419713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415995 + ... + 420723.

It is an arithmetic number, because the mean of its divisors is an integer number (169404950).

Almost surely, 2^1978419711 is an apocalyptic number.

1978419711 is a deficient number, since it is larger than the sum of its proper divisors (732059489).

1978419711 is a wasteful number, since it uses less digits than its factorization.

1978419711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8538.

The product of its digits is 127008, while the sum is 48.

The square root of 1978419711 is about 44479.4302009367. The cubic root of 1978419711 is about 1255.3730759647.

The spelling of 1978419711 in words is "one billion, nine hundred seventy-eight million, four hundred nineteen thousand, seven hundred eleven".