76569664642 has 32 divisors (see below), whose sum is σ = 124989871104. Its totient is φ = 35073561600.

The previous prime is 76569664637. The next prime is 76569664649. The reversal of 76569664642 is 24646696567.

It is not an unprimeable number, because it can be changed into a prime (76569664649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138459 + ... + 415102.

It is an arithmetic number, because the mean of its divisors is an integer number (3905933472).

Almost surely, 2^76569664642 is an apocalyptic number.

76569664642 is a deficient number, since it is larger than the sum of its proper divisors (48420206462).

76569664642 is a wasteful number, since it uses less digits than its factorization.

76569664642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553714.

The product of its digits is 78382080, while the sum is 61.

The spelling of 76569664642 in words is "seventy-six billion, five hundred sixty-nine million, six hundred sixty-four thousand, six hundred forty-two".