77606804651 has 2 divisors, whose sum is σ = 77606804652. Its totient is φ = 77606804650.

The previous prime is 77606804621. The next prime is 77606804663. The reversal of 77606804651 is 15640860677.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77606804651 - 2²⁶ = 77539695787 is a prime.

It is a super-2 number, since 2×77606804651² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77606804651.

It is not a weakly prime, because it can be changed into another prime (77606804621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38803402325 + 38803402326.

It is an arithmetic number, because the mean of its divisors is an integer number (38803402326).

Almost surely, 2^77606804651 is an apocalyptic number.

77606804651 is a deficient number, since it is larger than the sum of its proper divisors (1).

77606804651 is an equidigital number, since it uses as much as digits as its factorization.

77606804651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 77606804651 in words is "seventy-seven billion, six hundred six million, eight hundred four thousand, six hundred fifty-one".