12177590877 has 6 divisors (see below), whose sum is σ = 17589853502. Its totient is φ = 8118393912.

The previous prime is 12177590837. The next prime is 12177590899. The reversal of 12177590877 is 77809577121.

It can be written as a sum of positive squares in only one way, i.e., 11600582436 + 577008441 = 107706^2 + 24021^2 .

It is not a de Polignac number, because 12177590877 - 2⁷ = 12177590749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12177590837) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 676532818 + ... + 676532835.

Almost surely, 2^12177590877 is an apocalyptic number.

It is an amenable number.

12177590877 is a deficient number, since it is larger than the sum of its proper divisors (5412262625).

12177590877 is a wasteful number, since it uses less digits than its factorization.

12177590877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353065659 (or 1353065656 counting only the distinct ones).

The product of its (nonzero) digits is 1728720, while the sum is 54.

The spelling of 12177590877 in words is "twelve billion, one hundred seventy-seven million, five hundred ninety thousand, eight hundred seventy-seven".