81454409376067 has 32 divisors (see below), whose sum is σ = 110763894915072. Its totient is φ = 58019183000064.

The previous prime is 81454409376047. The next prime is 81454409376107. The reversal of 81454409376067 is 76067390445418.

It is not a de Polignac number, because 81454409376067 - 2¹⁵ = 81454409343299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81454409376047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1144597923 + ... + 1144669084.

It is an arithmetic number, because the mean of its divisors is an integer number (3461371716096).

Almost surely, 2^{81454409376067} is an apocalyptic number.

81454409376067 is a deficient number, since it is larger than the sum of its proper divisors (29309485539005).

81454409376067 is a wasteful number, since it uses less digits than its factorization.

81454409376067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289267067.

The product of its (nonzero) digits is 121927680, while the sum is 64.

The spelling of 81454409376067 in words is "eighty-one trillion, four hundred fifty-four billion, four hundred nine million, three hundred seventy-six thousand, sixty-seven".