2164257204455 has 4 divisors (see below), whose sum is σ = 2597108645352. Its totient is φ = 1731405763560.

The previous prime is 2164257204451. The next prime is 2164257204479. The reversal of 2164257204455 is 5544027524612.

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

It is not a de Polignac number, because 2164257204455 - 2² = 2164257204451 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 (2164257204451) 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, 216425720441 + ... + 216425720450.

It is an arithmetic number, because the mean of its divisors is an integer number (649277161338).

Almost surely, 2^{2164257204455} is an apocalyptic number.

2164257204455 is a deficient number, since it is larger than the sum of its proper divisors (432851440897).

2164257204455 is an equidigital number, since it uses as much as digits as its factorization.

2164257204455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432851440896.

The product of its (nonzero) digits is 2688000, while the sum is 47.

The spelling of 2164257204455 in words is "two trillion, one hundred sixty-four billion, two hundred fifty-seven million, two hundred four thousand, four hundred fifty-five".