2117579970 has 64 divisors (see below), whose sum is σ = 5622359040. Its totient is φ = 506116800.

The previous prime is 2117579941. The next prime is 2117580007. The reversal of 2117579970 is 799757112.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21760 + ... + 68619.

It is an arithmetic number, because the mean of its divisors is an integer number (87849360).

Almost surely, 2^2117579970 is an apocalyptic number.

2117579970 is an abundant number, since it is smaller than the sum of its proper divisors (3504779070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2117579970 is a wasteful number, since it uses less digits than its factorization.

2117579970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90471.

The product of its (nonzero) digits is 277830, while the sum is 48.

The square root of 2117579970 is about 46017.1703823692. The cubic root of 2117579970 is about 1284.1426591524.

The spelling of 2117579970 in words is "two billion, one hundred seventeen million, five hundred seventy-nine thousand, nine hundred seventy".