91489735634 has 16 divisors (see below), whose sum is σ = 149869607616. Its totient is φ = 41542040400.

The previous prime is 91489735627. The next prime is 91489735637. The reversal of 91489735634 is 43653798419.

It is not an unprimeable number, because it can be changed into a prime (91489735637) 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, 2188982 + ... + 2230385.

It is an arithmetic number, because the mean of its divisors is an integer number (9366850476).

Almost surely, 2^91489735634 is an apocalyptic number.

91489735634 is a deficient number, since it is larger than the sum of its proper divisors (58379871982).

91489735634 is a wasteful number, since it uses less digits than its factorization.

91489735634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4420321.

The product of its digits is 19595520, while the sum is 59.

The spelling of 91489735634 in words is "ninety-one billion, four hundred eighty-nine million, seven hundred thirty-five thousand, six hundred thirty-four".