77240597641 has 2 divisors, whose sum is σ = 77240597642. Its totient is φ = 77240597640.

The previous prime is 77240597563. The next prime is 77240597657. The reversal of 77240597641 is 14679504277.

It is a happy number.

77240597641 is nontrivially palindromic in base 12.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77039553600 + 201044041 = 277560^2 + 14179^2 .

It is a cyclic number.

It is not a de Polignac number, because 77240597641 - 2¹⁵ = 77240564873 is a prime.

It is a super-2 number, since 2×77240597641² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77240597341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38620298820 + 38620298821.

It is an arithmetic number, because the mean of its divisors is an integer number (38620298821).

Almost surely, 2^77240597641 is an apocalyptic number.

It is an amenable number.

77240597641 is a deficient number, since it is larger than the sum of its proper divisors (1).

77240597641 is an equidigital number, since it uses as much as digits as its factorization.

77240597641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 77240597641 in words is "seventy-seven billion, two hundred forty million, five hundred ninety-seven thousand, six hundred forty-one".