213364507172777 has 4 divisors (see below), whose sum is σ = 213395158595796. Its totient is φ = 213333855749760.

The previous prime is 213364507172767. The next prime is 213364507172837. The reversal of 213364507172777 is 777271705463312.

213364507172777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 111303111900841 + 102061395271936 = 10550029^2 + 10102544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213364507172777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213364507172767) 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, 15325701068 + ... + 15325714989.

It is an arithmetic number, because the mean of its divisors is an integer number (53348789648949).

Almost surely, 2^{213364507172777} is an apocalyptic number.

It is an amenable number.

213364507172777 is a deficient number, since it is larger than the sum of its proper divisors (30651423019).

213364507172777 is an equidigital number, since it uses as much as digits as its factorization.

213364507172777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30651423018.

The product of its (nonzero) digits is 72606240, while the sum is 62.

The spelling of 213364507172777 in words is "two hundred thirteen trillion, three hundred sixty-four billion, five hundred seven million, one hundred seventy-two thousand, seven hundred seventy-seven".