80776961927 has 4 divisors (see below), whose sum is σ = 80778980040. Its totient is φ = 80774943816.

The previous prime is 80776961911. The next prime is 80776961959. The reversal of 80776961927 is 72916967708.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80776961927 - 2⁴ = 80776961911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80776961927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80776261927) 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, 947777 + ... + 1029482.

It is an arithmetic number, because the mean of its divisors is an integer number (20194745010).

Almost surely, 2^80776961927 is an apocalyptic number.

80776961927 is a deficient number, since it is larger than the sum of its proper divisors (2018113).

80776961927 is a wasteful number, since it uses less digits than its factorization.

80776961927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018112.

The product of its (nonzero) digits is 16003008, while the sum is 62.

The spelling of 80776961927 in words is "eighty billion, seven hundred seventy-six million, nine hundred sixty-one thousand, nine hundred twenty-seven".