6529940650978 has 16 divisors (see below), whose sum is σ = 10221444535680. Its totient is φ = 3122811024256.

The previous prime is 6529940650907. The next prime is 6529940650979. The reversal of 6529940650978 is 8790560499256.

It is not an unprimeable number, because it can be changed into a prime (6529940650979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3925150 + ... + 5335417.

It is an arithmetic number, because the mean of its divisors is an integer number (638840283480).

Almost surely, 2^{6529940650978} is an apocalyptic number.

6529940650978 is a deficient number, since it is larger than the sum of its proper divisors (3691503884702).

6529940650978 is a wasteful number, since it uses less digits than its factorization.

6529940650978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9275921.

The product of its (nonzero) digits is 293932800, while the sum is 70.

The spelling of 6529940650978 in words is "six trillion, five hundred twenty-nine billion, nine hundred forty million, six hundred fifty thousand, nine hundred seventy-eight".