80477404009 has 2 divisors, whose sum is σ = 80477404010. Its totient is φ = 80477404008.

The previous prime is 80477403989. The next prime is 80477404037. The reversal of 80477404009 is 90040477408.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55599282025 + 24878121984 = 235795^2 + 157728^2 .

It is a cyclic number.

It is not a de Polignac number, because 80477404009 - 2⁹ = 80477403497 is a prime.

It is a super-2 number, since 2×80477404009² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80477404079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40238702004 + 40238702005.

It is an arithmetic number, because the mean of its divisors is an integer number (40238702005).

Almost surely, 2^80477404009 is an apocalyptic number.

It is an amenable number.

80477404009 is a deficient number, since it is larger than the sum of its proper divisors (1).

80477404009 is an equidigital number, since it uses as much as digits as its factorization.

80477404009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 80477404009 in words is "eighty billion, four hundred seventy-seven million, four hundred four thousand, nine".