8261215643012 has 12 divisors (see below), whose sum is σ = 14764725830400. Its totient is φ = 4042722548616.

The previous prime is 8261215643011. The next prime is 8261215643029. The reversal of 8261215643012 is 2103465121628.

It is a super-3 number, since 3×8261215643012³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (8261215643011) 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, 21971318012 + ... + 21971318387.

It is an arithmetic number, because the mean of its divisors is an integer number (1230393819200).

Almost surely, 2^{8261215643012} is an apocalyptic number.

It is an amenable number.

8261215643012 is a deficient number, since it is larger than the sum of its proper divisors (6503510187388).

8261215643012 is a wasteful number, since it uses less digits than its factorization.

8261215643012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43942636450 (or 43942636448 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 8261215643012 in words is "eight trillion, two hundred sixty-one billion, two hundred fifteen million, six hundred forty-three thousand, twelve".