6121640940651 has 24 divisors (see below), whose sum is σ = 9160002072000. Its totient is φ = 3934886118912.

The previous prime is 6121640940629. The next prime is 6121640940671. The reversal of 6121640940651 is 1560490461216.

It is not a de Polignac number, because 6121640940651 - 2¹⁹ = 6121640416363 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6121640940597 and 6121640940606.

It is not an unprimeable number, because it can be changed into a prime (6121640940671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16122886 + ... + 16498203.

It is an arithmetic number, because the mean of its divisors is an integer number (381666753000).

Almost surely, 2^{6121640940651} is an apocalyptic number.

6121640940651 is a deficient number, since it is larger than the sum of its proper divisors (3038361131349).

6121640940651 is a wasteful number, since it uses less digits than its factorization.

6121640940651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32621843 (or 32621840 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 6121640940651 in words is "six trillion, one hundred twenty-one billion, six hundred forty million, nine hundred forty thousand, six hundred fifty-one".