77071895889 has 4 divisors (see below), whose sum is σ = 102762527856. Its totient is φ = 51381263924.

The previous prime is 77071895843. The next prime is 77071895891. The reversal of 77071895889 is 98859817077.

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 77071895889 - 2²⁰ = 77070847313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77071895389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12845315979 + ... + 12845315984.

It is an arithmetic number, because the mean of its divisors is an integer number (25690631964).

Almost surely, 2^77071895889 is an apocalyptic number.

It is an amenable number.

77071895889 is a deficient number, since it is larger than the sum of its proper divisors (25690631967).

77071895889 is a wasteful number, since it uses less digits than its factorization.

77071895889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25690631966.

The product of its (nonzero) digits is 71124480, while the sum is 69.

The spelling of 77071895889 in words is "seventy-seven billion, seventy-one million, eight hundred ninety-five thousand, eight hundred eighty-nine".