2117779340 has 12 divisors (see below), whose sum is σ = 4447336656. Its totient is φ = 847111728.

The previous prime is 2117779333. The next prime is 2117779357. The reversal of 2117779340 is 439777112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52944464 + ... + 52944503.

It is an arithmetic number, because the mean of its divisors is an integer number (370611388).

Almost surely, 2^2117779340 is an apocalyptic number.

2117779340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2117779340 is an abundant number, since it is smaller than the sum of its proper divisors (2329557316).

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

2117779340 is a wasteful number, since it uses less digits than its factorization.

2117779340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105888976 (or 105888974 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 2117779340 is about 46019.3365880040. The cubic root of 2117779340 is about 1284.1829585336.

The spelling of 2117779340 in words is "two billion, one hundred seventeen million, seven hundred seventy-nine thousand, three hundred forty".