91049070925 has 36 divisors (see below), whose sum is σ = 115953510420. Its totient is φ = 70919134720.

The previous prime is 91049070923. The next prime is 91049070929. The reversal of 91049070925 is 52907094019.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 7716392649 + 83332678276 = 87843^2 + 288674^2 .

It is not a de Polignac number, because 91049070925 - 2¹ = 91049070923 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91049070923) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10875141 + ... + 10883509.

It is an arithmetic number, because the mean of its divisors is an integer number (3220930845).

Almost surely, 2^91049070925 is an apocalyptic number.

It is an amenable number.

91049070925 is a deficient number, since it is larger than the sum of its proper divisors (24904439495).

91049070925 is a wasteful number, since it uses less digits than its factorization.

91049070925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8670 (or 8618 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 46.

The spelling of 91049070925 in words is "ninety-one billion, forty-nine million, seventy thousand, nine hundred twenty-five".