12040409977 has 2 divisors, whose sum is σ = 12040409978. Its totient is φ = 12040409976.

The previous prime is 12040409971. The next prime is 12040410103. The reversal of 12040409977 is 77990404021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11995506576 + 44903401 = 109524^2 + 6701^2 .

It is a cyclic number.

It is not a de Polignac number, because 12040409977 - 2²³ = 12032021369 is a prime.

It is a super-2 number, since 2×12040409977² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12040409971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6020204988 + 6020204989.

It is an arithmetic number, because the mean of its divisors is an integer number (6020204989).

Almost surely, 2^12040409977 is an apocalyptic number.

It is an amenable number.

12040409977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12040409977 is an equidigital number, since it uses as much as digits as its factorization.

12040409977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 12040409977 in words is "twelve billion, forty million, four hundred nine thousand, nine hundred seventy-seven".