2121641464 has 16 divisors (see below), whose sum is σ = 3989887200. Its totient is φ = 1057671552.

The previous prime is 2121641447. The next prime is 2121641471. The reversal of 2121641464 is 4641461212.

It is a congruent number.

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, 390784 + ... + 396175.

It is an arithmetic number, because the mean of its divisors is an integer number (249367950).

Almost surely, 2^2121641464 is an apocalyptic number.

It is an amenable number.

2121641464 is a deficient number, since it is larger than the sum of its proper divisors (1868245736).

2121641464 is a wasteful number, since it uses less digits than its factorization.

2121641464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787302 (or 787298 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 2121641464 is about 46061.2794438018. The cubic root of 2121641464 is about 1284.9631251057.

The spelling of 2121641464 in words is "two billion, one hundred twenty-one million, six hundred forty-one thousand, four hundred sixty-four".