76860908644 has 27 divisors (see below), whose sum is σ = 145662808473. Its totient is φ = 35470938672.

The previous prime is 76860908633. The next prime is 76860908653. The reversal of 76860908644 is 44680906867.

The square root of 76860908644 is 277238.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11369956900 + 65490951744 = 106630^2 + 255912^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7202857 + ... + 7213519.

Almost surely, 2^76860908644 is an apocalyptic number.

76860908644 is the 277238-th square number.

It is an amenable number.

76860908644 is a deficient number, since it is larger than the sum of its proper divisors (68801899829).

76860908644 is an equidigital number, since it uses as much as digits as its factorization.

76860908644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21356 (or 10678 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 58.

The spelling of 76860908644 in words is "seventy-six billion, eight hundred sixty million, nine hundred eight thousand, six hundred forty-four".