77617917511 has 2 divisors, whose sum is σ = 77617917512. Its totient is φ = 77617917510.

The previous prime is 77617917493. The next prime is 77617917547. The reversal of 77617917511 is 11571971677.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77617917511 is a prime.

It is a super-2 number, since 2×77617917511² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77617917911) 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, 38808958755 + 38808958756.

It is an arithmetic number, because the mean of its divisors is an integer number (38808958756).

Almost surely, 2^77617917511 is an apocalyptic number.

77617917511 is a deficient number, since it is larger than the sum of its proper divisors (1).

77617917511 is an equidigital number, since it uses as much as digits as its factorization.

77617917511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648270, while the sum is 52.

The spelling of 77617917511 in words is "seventy-seven billion, six hundred seventeen million, nine hundred seventeen thousand, five hundred eleven".