84180761447 has 2 divisors, whose sum is σ = 84180761448. Its totient is φ = 84180761446.

The previous prime is 84180761437. The next prime is 84180761459. The reversal of 84180761447 is 74416708148.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84180761447 - 2¹² = 84180757351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84180761395 and 84180761404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84180761437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42090380723 + 42090380724.

It is an arithmetic number, because the mean of its divisors is an integer number (42090380724).

Almost surely, 2^84180761447 is an apocalyptic number.

84180761447 is a deficient number, since it is larger than the sum of its proper divisors (1).

84180761447 is an equidigital number, since it uses as much as digits as its factorization.

84180761447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1204224, while the sum is 50.

The spelling of 84180761447 in words is "eighty-four billion, one hundred eighty million, seven hundred sixty-one thousand, four hundred forty-seven".