91516470 has 64 divisors (see below), whose sum is σ = 228628224. Its totient is φ = 23425920.

The previous prime is 91516463. The next prime is 91516487. The reversal of 91516470 is 7461519.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78109 + ... + 79271.

It is an arithmetic number, because the mean of its divisors is an integer number (3572316).

Almost surely, 2^91516470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91516470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114314112).

91516470 is an abundant number, since it is smaller than the sum of its proper divisors (137111754).

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

91516470 is a wasteful number, since it uses less digits than its factorization.

91516470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 91516470 is about 9566.4240968086. The cubic root of 91516470 is about 450.6434744911.

Adding to 91516470 its reverse (7461519), we get a palindrome (98977989).

The spelling of 91516470 in words is "ninety-one million, five hundred sixteen thousand, four hundred seventy".