2116421764 has 12 divisors (see below), whose sum is σ = 3705856000. Its totient is φ = 1057605768.

The previous prime is 2116421759. The next prime is 2116421789. The reversal of 2116421764 is 4671246112.

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, 143364 + ... + 157435.

Almost surely, 2^2116421764 is an apocalyptic number.

It is an amenable number.

2116421764 is a deficient number, since it is larger than the sum of its proper divisors (1589434236).

2116421764 is a wasteful number, since it uses less digits than its factorization.

2116421764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302562 (or 302560 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 2116421764 is about 46004.5841628853. The cubic root of 2116421764 is about 1283.9084967288.

Adding to 2116421764 its reverse (4671246112), we get a palindrome (6787667876).

The spelling of 2116421764 in words is "two billion, one hundred sixteen million, four hundred twenty-one thousand, seven hundred sixty-four".