91408288378 has 16 divisors (see below), whose sum is σ = 150900895296. Its totient is φ = 41181528640.

The previous prime is 91408288373. The next prime is 91408288379. The reversal of 91408288378 is 87388280419.

It is not an unprimeable number, because it can be changed into a prime (91408288373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18382126 + ... + 18387097.

It is an arithmetic number, because the mean of its divisors is an integer number (9431305956).

Almost surely, 2^91408288378 is an apocalyptic number.

91408288378 is a deficient number, since it is larger than the sum of its proper divisors (59492606918).

91408288378 is a wasteful number, since it uses less digits than its factorization.

91408288378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36769349.

The product of its (nonzero) digits is 6193152, while the sum is 58.

The spelling of 91408288378 in words is "ninety-one billion, four hundred eight million, two hundred eighty-eight thousand, three hundred seventy-eight".