6861621164115 has 32 divisors (see below), whose sum is σ = 11092127394816. Its totient is φ = 3621731299200.

The previous prime is 6861621164077. The next prime is 6861621164117. The reversal of 6861621164115 is 5114611261686.

It is not a de Polignac number, because 6861621164115 - 2⁹ = 6861621163603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6861621164117) 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, 1076890 + ... + 3857840.

It is an arithmetic number, because the mean of its divisors is an integer number (346628981088).

Almost surely, 2^{6861621164115} is an apocalyptic number.

6861621164115 is a deficient number, since it is larger than the sum of its proper divisors (4230506230701).

6861621164115 is a wasteful number, since it uses less digits than its factorization.

6861621164115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782659.

The product of its digits is 414720, while the sum is 48.

The spelling of 6861621164115 in words is "six trillion, eight hundred sixty-one billion, six hundred twenty-one million, one hundred sixty-four thousand, one hundred fifteen".