77655161 has 4 divisors (see below), whose sum is σ = 77682000. Its totient is φ = 77628324.

The previous prime is 77655131. The next prime is 77655181. The reversal of 77655161 is 16155677.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77655161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77655121) 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 in 3 ways as a sum of consecutive naturals, for example, 8471 + ... + 15068.

It is an arithmetic number, because the mean of its divisors is an integer number (19420500).

Almost surely, 2^77655161 is an apocalyptic number.

It is an amenable number.

77655161 is a deficient number, since it is larger than the sum of its proper divisors (26839).

77655161 is a wasteful number, since it uses less digits than its factorization.

77655161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26838.

The product of its digits is 44100, while the sum is 38.

The square root of 77655161 is about 8812.2165770026. The cubic root of 77655161 is about 426.6352886945.

The spelling of 77655161 in words is "seventy-seven million, six hundred fifty-five thousand, one hundred sixty-one".