91454688645420 has 24 divisors (see below), whose sum is σ = 256073128207344. Its totient is φ = 24387916972096.

The previous prime is 91454688645407. The next prime is 91454688645421. The reversal of 91454688645420 is 2454688645419.

It is not an unprimeable number, because it can be changed into a prime (91454688645421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762122405319 + ... + 762122405438.

It is an arithmetic number, because the mean of its divisors is an integer number (10669713675306).

Almost surely, 2^{91454688645420} is an apocalyptic number.

It is an amenable number.

91454688645420 is an abundant number, since it is smaller than the sum of its proper divisors (164618439561924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91454688645420 is a wasteful number, since it uses less digits than its factorization.

91454688645420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524244810769 (or 1524244810767 counting only the distinct ones).

The product of its (nonzero) digits is 265420800, while the sum is 66.

The spelling of 91454688645420 in words is "ninety-one trillion, four hundred fifty-four billion, six hundred eighty-eight million, six hundred forty-five thousand, four hundred twenty".