77055811 has 12 divisors (see below), whose sum is σ = 92945712. Its totient is φ = 62569584.

The previous prime is 77055809. The next prime is 77055817. The reversal of 77055811 is 11855077.

It is not a de Polignac number, because 77055811 - 2¹ = 77055809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77055817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12720 + ... + 17773.

It is an arithmetic number, because the mean of its divisors is an integer number (7745476).

Almost surely, 2^77055811 is an apocalyptic number.

77055811 is a deficient number, since it is larger than the sum of its proper divisors (15889901).

77055811 is a wasteful number, since it uses less digits than its factorization.

77055811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30538 (or 30519 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 34.

The square root of 77055811 is about 8778.1439382138. The cubic root of 77055811 is about 425.5348486580.

The spelling of 77055811 in words is "seventy-seven million, fifty-five thousand, eight hundred eleven".