91483136640 has 1280 divisors, whose sum is σ = 397108293120. Its totient is φ = 19619905536.

The previous prime is 91483136629. The next prime is 91483136741. The reversal of 91483136640 is 4663138419.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 809585224 + ... + 809585336.

It is an arithmetic number, because the mean of its divisors is an integer number (310240854).

Almost surely, 2^91483136640 is an apocalyptic number.

91483136640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91483136640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198554146560).

91483136640 is an abundant number, since it is smaller than the sum of its proper divisors (305625156480).

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

91483136640 is a wasteful number, since it uses less digits than its factorization.

91483136640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 91483136640 in words is "ninety-one billion, four hundred eighty-three million, one hundred thirty-six thousand, six hundred forty".