188486100478469 has 2 divisors, whose sum is σ = 188486100478470. Its totient is φ = 188486100478468.

The previous prime is 188486100478463. The next prime is 188486100478513. The reversal of 188486100478469 is 964874001684881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133406889036100 + 55079211442369 = 11550190^2 + 7421537^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188486100478469 is a prime.

It is a super-2 number, since 2×188486100478469² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 188486100478396 and 188486100478405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188486100478463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94243050239234 + 94243050239235.

It is an arithmetic number, because the mean of its divisors is an integer number (94243050239235).

Almost surely, 2^{188486100478469} is an apocalyptic number.

It is an amenable number.

188486100478469 is a deficient number, since it is larger than the sum of its proper divisors (1).

188486100478469 is an equidigital number, since it uses as much as digits as its factorization.

188486100478469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 594542592, while the sum is 74.

The spelling of 188486100478469 in words is "one hundred eighty-eight trillion, four hundred eighty-six billion, one hundred million, four hundred seventy-eight thousand, four hundred sixty-nine".