2117719478 has 32 divisors (see below), whose sum is σ = 3846610944. Its totient is φ = 853610112.

The previous prime is 2117719459. The next prime is 2117719481. The reversal of 2117719478 is 8749177112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531851 + ... + 535817.

It is an arithmetic number, because the mean of its divisors is an integer number (120206592).

Almost surely, 2^2117719478 is an apocalyptic number.

2117719478 is a deficient number, since it is larger than the sum of its proper divisors (1728891466).

2117719478 is a wasteful number, since it uses less digits than its factorization.

2117719478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6236.

The product of its digits is 197568, while the sum is 47.

The square root of 2117719478 is about 46018.6861828975. The cubic root of 2117719478 is about 1284.1708586762.

The spelling of 2117719478 in words is "two billion, one hundred seventeen million, seven hundred nineteen thousand, four hundred seventy-eight".