91225770560 has 28 divisors (see below), whose sum is σ = 217231366908. Its totient is φ = 36490308096.

The previous prime is 91225770541. The next prime is 91225770563. The reversal of 91225770560 is 6507752219.

It can be written as a sum of positive squares in 2 ways, for example, as 24616354816 + 66609415744 = 156896^2 + 258088^2 .

It is not an unprimeable number, because it can be changed into a prime (91225770563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142539947 + ... + 142540586.

Almost surely, 2^91225770560 is an apocalyptic number.

It is an amenable number.

91225770560 is an abundant number, since it is smaller than the sum of its proper divisors (126005596348).

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

91225770560 is a wasteful number, since it uses less digits than its factorization.

91225770560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285080550 (or 285080540 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 44.

The spelling of 91225770560 in words is "ninety-one billion, two hundred twenty-five million, seven hundred seventy thousand, five hundred sixty".