91472172480 has 280 divisors, whose sum is σ = 350413332192. Its totient is φ = 22516144128.

The previous prime is 91472172457. The next prime is 91472172481. The reversal of 91472172480 is 8427127419.

91472172480 is a `hidden beast` number, since 9 + 1 + 472 + 172 + 4 + 8 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91472172481) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 201229 + ... + 472691.

Almost surely, 2^91472172480 is an apocalyptic number.

91472172480 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 91472172480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175206666096).

91472172480 is an abundant number, since it is smaller than the sum of its proper divisors (258941159712).

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

91472172480 is a wasteful number, since it uses less digits than its factorization.

91472172480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271505 (or 271486 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

Adding to 91472172480 its reverse (8427127419), we get a palindrome (99899299899).

The spelling of 91472172480 in words is "ninety-one billion, four hundred seventy-two million, one hundred seventy-two thousand, four hundred eighty".