77648452793 has 2 divisors, whose sum is σ = 77648452794. Its totient is φ = 77648452792.

The previous prime is 77648452723. The next prime is 77648452807. The reversal of 77648452793 is 39725484677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77193398569 + 455054224 = 277837^2 + 21332^2 .

It is a cyclic number.

It is not a de Polignac number, because 77648452793 - 2¹⁸ = 77648190649 is a prime.

It is a super-2 number, since 2×77648452793² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77648452723) 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, 38824226396 + 38824226397.

It is an arithmetic number, because the mean of its divisors is an integer number (38824226397).

Almost surely, 2^77648452793 is an apocalyptic number.

It is an amenable number.

77648452793 is a deficient number, since it is larger than the sum of its proper divisors (1).

77648452793 is an equidigital number, since it uses as much as digits as its factorization.

77648452793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71124480, while the sum is 62.

The spelling of 77648452793 in words is "seventy-seven billion, six hundred forty-eight million, four hundred fifty-two thousand, seven hundred ninety-three".