215745810673 has 4 divisors (see below), whose sum is σ = 227100853360. Its totient is φ = 204390767988.

The previous prime is 215745810667. The next prime is 215745810701. The reversal of 215745810673 is 376018547512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215745810673 - 2¹⁷ = 215745679601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215745816673) 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, 5677521315 + ... + 5677521352.

It is an arithmetic number, because the mean of its divisors is an integer number (56775213340).

Almost surely, 2^215745810673 is an apocalyptic number.

It is an amenable number.

215745810673 is a deficient number, since it is larger than the sum of its proper divisors (11355042687).

215745810673 is a wasteful number, since it uses less digits than its factorization.

215745810673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11355042686.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 215745810673 in words is "two hundred fifteen billion, seven hundred forty-five million, eight hundred ten thousand, six hundred seventy-three".