6121720514164 has 12 divisors (see below), whose sum is σ = 10744800252004. Its totient is φ = 3051777585024.

The previous prime is 6121720514149. The next prime is 6121720514171. The reversal of 6121720514164 is 4614150271216.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3676537804900 + 2445182709264 = 1917430^2 + 1563708^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2270666499 + ... + 2270669194.

Almost surely, 2^{6121720514164} is an apocalyptic number.

It is an amenable number.

6121720514164 is a deficient number, since it is larger than the sum of its proper divisors (4623079737840).

6121720514164 is a wasteful number, since it uses less digits than its factorization.

6121720514164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4541336034 (or 4541336032 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 6121720514164 in words is "six trillion, one hundred twenty-one billion, seven hundred twenty million, five hundred fourteen thousand, one hundred sixty-four".