2164621122415 has 4 divisors (see below), whose sum is σ = 2597545346904. Its totient is φ = 1731696897928.

The previous prime is 2164621122413. The next prime is 2164621122473. The reversal of 2164621122415 is 5142211264612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2164621122415 - 2¹ = 2164621122413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164621122413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216462112237 + ... + 216462112246.

It is an arithmetic number, because the mean of its divisors is an integer number (649386336726).

Almost surely, 2^{2164621122415} is an apocalyptic number.

2164621122415 is a deficient number, since it is larger than the sum of its proper divisors (432924224489).

2164621122415 is an equidigital number, since it uses as much as digits as its factorization.

2164621122415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432924224488.

The product of its digits is 46080, while the sum is 37.

The spelling of 2164621122415 in words is "two trillion, one hundred sixty-four billion, six hundred twenty-one million, one hundred twenty-two thousand, four hundred fifteen".