6861621164116 has 12 divisors (see below), whose sum is σ = 12287089061632. Its totient is φ = 3351024289368.

The previous prime is 6861621164077. The next prime is 6861621164117. The reversal of 6861621164116 is 6114611261686.

It is a super-2 number, since 2×6861621164116² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6861621164116.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 19946572980 + ... + 19946573323.

Almost surely, 2^{6861621164116} is an apocalyptic number.

It is an amenable number.

6861621164116 is a deficient number, since it is larger than the sum of its proper divisors (5425467897516).

6861621164116 is a wasteful number, since it uses less digits than its factorization.

6861621164116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39893146350 (or 39893146348 counting only the distinct ones).

The product of its digits is 497664, while the sum is 49.

The spelling of 6861621164116 in words is "six trillion, eight hundred sixty-one billion, six hundred twenty-one million, one hundred sixty-four thousand, one hundred sixteen".