91651016540160 has 3360 divisors, whose sum is σ = 433210147776000. Its totient is φ = 18024832696320.

The previous prime is 91651016540143. The next prime is 91651016540189. The reversal of 91651016540160 is 6104561015619.

91651016540160 is a `hidden beast` number, since 9 + 16 + 5 + 10 + 165 + 401 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (3360).

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 223 ways as a sum of consecutive naturals, for example, 87369891316 + ... + 87369892364.

It is an arithmetic number, because the mean of its divisors is an integer number (128931591600).

Almost surely, 2^{91651016540160} is an apocalyptic number.

91651016540160 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 91651016540160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216605073888000).

91651016540160 is an abundant number, since it is smaller than the sum of its proper divisors (341559131235840).

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

91651016540160 is a wasteful number, since it uses less digits than its factorization.

91651016540160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137 (or 1096 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

Adding to 91651016540160 its reverse (6104561015619), we get a palindrome (97755577555779).

The spelling of 91651016540160 in words is "ninety-one trillion, six hundred fifty-one billion, sixteen million, five hundred forty thousand, one hundred sixty".