12077777777 has 16 divisors (see below), whose sum is σ = 13387476480. Its totient is φ = 10827086400.

The previous prime is 12077777753. The next prime is 12077777791. The reversal of 12077777777 is 77777777021.

It is a happy number.

It is not a de Polignac number, because 12077777777 - 2¹⁴ = 12077761393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12077777707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33749 + ... + 159042.

It is an arithmetic number, because the mean of its divisors is an integer number (836717280).

Almost surely, 2^12077777777 is an apocalyptic number.

It is an amenable number.

12077777777 is a deficient number, since it is larger than the sum of its proper divisors (1309698703).

12077777777 is a wasteful number, since it uses less digits than its factorization.

12077777777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192944.

The product of its (nonzero) digits is 11529602, while the sum is 59.

The spelling of 12077777777 in words is "twelve billion, seventy-seven million, seven hundred seventy-seven thousand, seven hundred seventy-seven".