91477676444 has 144 divisors (see below), whose sum is σ = 211107708000. Its totient is φ = 34256033280.

The previous prime is 91477676441. The next prime is 91477676449. The reversal of 91477676444 is 44467677419.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91477676441) 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 47 ways as a sum of consecutive naturals, for example, 14314802 + ... + 14321190.

It is an arithmetic number, because the mean of its divisors is an integer number (1466025750).

Almost surely, 2^91477676444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91477676444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105553854000).

91477676444 is an abundant number, since it is smaller than the sum of its proper divisors (119630031556).

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

91477676444 is a wasteful number, since it uses less digits than its factorization.

91477676444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6676 (or 6667 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 59.

The spelling of 91477676444 in words is "ninety-one billion, four hundred seventy-seven million, six hundred seventy-six thousand, four hundred forty-four".