6623856212015 has 32 divisors (see below), whose sum is σ = 9213688175616. Its totient is φ = 4477323755520.

The previous prime is 6623856212011. The next prime is 6623856212041. The reversal of 6623856212015 is 5102126583266.

It is not a de Polignac number, because 6623856212015 - 2² = 6623856212011 is a prime.

It is a super-2 number, since 2×6623856212015² (a number of 26 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 (6623856212011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14291759 + ... + 14747951.

It is an arithmetic number, because the mean of its divisors is an integer number (287927755488).

Almost surely, 2^{6623856212015} is an apocalyptic number.

6623856212015 is a deficient number, since it is larger than the sum of its proper divisors (2589831963601).

6623856212015 is a wasteful number, since it uses less digits than its factorization.

6623856212015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462119.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 6623856212015 in words is "six trillion, six hundred twenty-three billion, eight hundred fifty-six million, two hundred twelve thousand, fifteen".