8261215643011 has 2 divisors, whose sum is σ = 8261215643012. Its totient is φ = 8261215643010.

The previous prime is 8261215642993. The next prime is 8261215643029. The reversal of 8261215643011 is 1103465121628.

It is a balanced prime because it is at equal distance from previous prime (8261215642993) and next prime (8261215643029).

It is a cyclic number.

It is not a de Polignac number, because 8261215643011 - 2¹⁵ = 8261215610243 is a prime.

It is a super-2 number, since 2×8261215643011² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8261215643041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4130607821505 + 4130607821506.

It is an arithmetic number, because the mean of its divisors is an integer number (4130607821506).

Almost surely, 2^{8261215643011} is an apocalyptic number.

8261215643011 is a deficient number, since it is larger than the sum of its proper divisors (1).

8261215643011 is an equidigital number, since it uses as much as digits as its factorization.

8261215643011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 8261215643011 in words is "eight trillion, two hundred sixty-one billion, two hundred fifteen million, six hundred forty-three thousand, eleven".