133778478871 has 2 divisors, whose sum is σ = 133778478872. Its totient is φ = 133778478870.

The previous prime is 133778478863. The next prime is 133778478901. The reversal of 133778478871 is 178874877331.

It is a weak prime.

It is an emirp because it is prime and its reverse (178874877331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133778478871 - 2³ = 133778478863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133778478571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66889239435 + 66889239436.

It is an arithmetic number, because the mean of its divisors is an integer number (66889239436).

Almost surely, 2^133778478871 is an apocalyptic number.

133778478871 is a deficient number, since it is larger than the sum of its proper divisors (1).

133778478871 is an equidigital number, since it uses as much as digits as its factorization.

133778478871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44255232, while the sum is 64.

The spelling of 133778478871 in words is "one hundred thirty-three billion, seven hundred seventy-eight million, four hundred seventy-eight thousand, eight hundred seventy-one".