76720221144064 has 33 divisors (see below), whose sum is σ = 153366080502007. Its totient is φ = 38359970427904.

The previous prime is 76720221144013. The next prime is 76720221144101. The reversal of 76720221144064 is 46044112202767.

The square root of 76720221144064 is 8759008.

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

It is a Duffinian number.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 280151397 + ... + 280425115.

Almost surely, 2^{76720221144064} is an apocalyptic number.

76720221144064 is the 8759008-th square number.

It is an amenable number.

76720221144064 is a deficient number, since it is larger than the sum of its proper divisors (76645859357943).

76720221144064 is an frugal number, since it uses more digits than its factorization.

76720221144064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547458 (or 273721 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 46.

The spelling of 76720221144064 in words is "seventy-six trillion, seven hundred twenty billion, two hundred twenty-one million, one hundred forty-four thousand, sixty-four".