77136511 has 2 divisors, whose sum is σ = 77136512. Its totient is φ = 77136510.

The previous prime is 77136509. The next prime is 77136517. The reversal of 77136511 is 11563177.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77136511 - 2¹ = 77136509 is a prime.

It is a super-3 number, since 3×77136511³ (a number of 25 digits) contains 333 as substring.

Together with 77136509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77136517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38568255 + 38568256.

It is an arithmetic number, because the mean of its divisors is an integer number (38568256).

Almost surely, 2^77136511 is an apocalyptic number.

77136511 is a deficient number, since it is larger than the sum of its proper divisors (1).

77136511 is an equidigital number, since it uses as much as digits as its factorization.

77136511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4410, while the sum is 31.

The square root of 77136511 is about 8782.7393790320. The cubic root of 77136511 is about 425.6833500302.

Adding to 77136511 its reverse (11563177), we get a palindrome (88699688).

The spelling of 77136511 in words is "seventy-seven million, one hundred thirty-six thousand, five hundred eleven".