180400474669 has 2 divisors, whose sum is σ = 180400474670. Its totient is φ = 180400474668.

The previous prime is 180400474643. The next prime is 180400474679. The reversal of 180400474669 is 966474004081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110498402569 + 69902072100 = 332413^2 + 264390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180400474669 is a prime.

It is a super-2 number, since 2×180400474669² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180400474679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90200237334 + 90200237335.

It is an arithmetic number, because the mean of its divisors is an integer number (90200237335).

Almost surely, 2^180400474669 is an apocalyptic number.

It is an amenable number.

180400474669 is a deficient number, since it is larger than the sum of its proper divisors (1).

180400474669 is an equidigital number, since it uses as much as digits as its factorization.

180400474669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 180400474669 in words is "one hundred eighty billion, four hundred million, four hundred seventy-four thousand, six hundred sixty-nine".