91645060 has 24 divisors (see below), whose sum is σ = 207259416. Its totient is φ = 33838080.

The previous prime is 91645051. The next prime is 91645061. The reversal of 91645060 is 6054619.

It can be written as a sum of positive squares in 4 ways, for example, as 2795584 + 88849476 = 1672^2 + 9426^2 .

It is not an unprimeable number, because it can be changed into a prime (91645061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175981 + ... + 176500.

It is an arithmetic number, because the mean of its divisors is an integer number (8635809).

Almost surely, 2^91645060 is an apocalyptic number.

It is an amenable number.

91645060 is an abundant number, since it is smaller than the sum of its proper divisors (115614356).

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

91645060 is a wasteful number, since it uses less digits than its factorization.

91645060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352503 (or 352501 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 91645060 is about 9573.1426396978. The cubic root of 91645060 is about 450.8544424348.

Adding to 91645060 its reverse (6054619), we get a palindrome (97699679).

The spelling of 91645060 in words is "ninety-one million, six hundred forty-five thousand, sixty".