8213478282677 has 4 divisors (see below), whose sum is σ = 8213488376940. Its totient is φ = 8213468188416.

The previous prime is 8213478282613. The next prime is 8213478282689. The reversal of 8213478282677 is 7762828743128.

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 5676549267601 + 2536929015076 = 2382551^2 + 1592774^2 .

It is a cyclic number.

It is not a de Polignac number, because 8213478282677 - 2⁶ = 8213478282613 is a prime.

It is a super-2 number, since 2×8213478282677² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8213478281677) 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, 3708218 + ... + 5493435.

It is an arithmetic number, because the mean of its divisors is an integer number (2053372094235).

Almost surely, 2^{8213478282677} is an apocalyptic number.

It is an amenable number.

8213478282677 is a deficient number, since it is larger than the sum of its proper divisors (10094263).

8213478282677 is an equidigital number, since it uses as much as digits as its factorization.

8213478282677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10094262.

The product of its digits is 101154816, while the sum is 65.

The spelling of 8213478282677 in words is "eight trillion, two hundred thirteen billion, four hundred seventy-eight million, two hundred eighty-two thousand, six hundred seventy-seven".