77624712901 has 2 divisors, whose sum is σ = 77624712902. Its totient is φ = 77624712900.

The previous prime is 77624712887. The next prime is 77624712923. The reversal of 77624712901 is 10921742677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75049150401 + 2575562500 = 273951^2 + 50750^2 .

It is a cyclic number.

It is not a de Polignac number, because 77624712901 - 2¹¹ = 77624710853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77624712941) 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 as a sum of consecutive naturals, namely, 38812356450 + 38812356451.

It is an arithmetic number, because the mean of its divisors is an integer number (38812356451).

Almost surely, 2^77624712901 is an apocalyptic number.

It is an amenable number.

77624712901 is a deficient number, since it is larger than the sum of its proper divisors (1).

77624712901 is an equidigital number, since it uses as much as digits as its factorization.

77624712901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 46.

The spelling of 77624712901 in words is "seventy-seven billion, six hundred twenty-four million, seven hundred twelve thousand, nine hundred one".