2117456642 has 16 divisors (see below), whose sum is σ = 3631754880. Its totient is φ = 907024128.

The previous prime is 2117456633. The next prime is 2117456647. The reversal of 2117456642 is 2466547112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2117456596 and 2117456605.

It is not an unprimeable number, because it can be changed into a prime (2117456647) 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, 8543 + ... + 65634.

It is an arithmetic number, because the mean of its divisors is an integer number (226984680).

Almost surely, 2^2117456642 is an apocalyptic number.

2117456642 is a deficient number, since it is larger than the sum of its proper divisors (1514298238).

2117456642 is a wasteful number, since it uses less digits than its factorization.

2117456642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76225.

The product of its digits is 80640, while the sum is 38.

The square root of 2117456642 is about 46015.8303413075. The cubic root of 2117456642 is about 1284.1177291501.

The spelling of 2117456642 in words is "two billion, one hundred seventeen million, four hundred fifty-six thousand, six hundred forty-two".