7028686651213 has 4 divisors (see below), whose sum is σ = 7107660658620. Its totient is φ = 6949712643808.

The previous prime is 7028686651199. The next prime is 7028686651223. The reversal of 7028686651213 is 3121566868207.

It is a happy number.

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 3710758826889 + 3317927824324 = 1926333^2 + 1821518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7028686651213 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 (7028686651223) 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, 39487003570 + ... + 39487003747.

It is an arithmetic number, because the mean of its divisors is an integer number (1776915164655).

Almost surely, 2^{7028686651213} is an apocalyptic number.

It is an amenable number.

7028686651213 is a deficient number, since it is larger than the sum of its proper divisors (78974007407).

7028686651213 is an equidigital number, since it uses as much as digits as its factorization.

7028686651213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78974007406.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 7028686651213 in words is "seven trillion, twenty-eight billion, six hundred eighty-six million, six hundred fifty-one thousand, two hundred thirteen".