77110561 has 4 divisors (see below), whose sum is σ = 84120624. Its totient is φ = 70100500.

The previous prime is 77110549. The next prime is 77110591. The reversal of 77110561 is 16501177.

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 not a de Polignac number, because 77110561 - 2⁵ = 77110529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77110511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3505015 + ... + 3505036.

It is an arithmetic number, because the mean of its divisors is an integer number (21030156).

Almost surely, 2^77110561 is an apocalyptic number.

It is an amenable number.

77110561 is a deficient number, since it is larger than the sum of its proper divisors (7010063).

77110561 is a wasteful number, since it uses less digits than its factorization.

77110561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7010062.

The product of its (nonzero) digits is 1470, while the sum is 28.

The square root of 77110561 is about 8781.2619252588. The cubic root of 77110561 is about 425.6356090329.

The spelling of 77110561 in words is "seventy-seven million, one hundred ten thousand, five hundred sixty-one".