76728868621679 has 2 divisors, whose sum is σ = 76728868621680. Its totient is φ = 76728868621678.

The previous prime is 76728868621637. The next prime is 76728868621759. The reversal of 76728868621679 is 97612686882767.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 76728868621679 - 2³² = 76724573654383 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 76728868621597 and 76728868621606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76728868621079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38364434310839 + 38364434310840.

It is an arithmetic number, because the mean of its divisors is an integer number (38364434310840).

Almost surely, 2^{76728868621679} is an apocalyptic number.

76728868621679 is a deficient number, since it is larger than the sum of its proper divisors (1).

76728868621679 is an equidigital number, since it uses as much as digits as its factorization.

76728868621679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8193540096, while the sum is 83.

The spelling of 76728868621679 in words is "seventy-six trillion, seven hundred twenty-eight billion, eight hundred sixty-eight million, six hundred twenty-one thousand, six hundred seventy-nine".