91434296825 has 12 divisors (see below), whose sum is σ = 113382668268. Its totient is φ = 73144766400.

The previous prime is 91434296819. The next prime is 91434296843. The reversal of 91434296825 is 52869243419.

It can be written as a sum of positive squares in 6 ways, for example, as 32765706169 + 58668590656 = 181013^2 + 242216^2 .

It is a de Polignac number, because none of the positive numbers 2^k-91434296825 is a prime.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 913979 + ... + 1009071.

It is an arithmetic number, because the mean of its divisors is an integer number (9448555689).

Almost surely, 2^91434296825 is an apocalyptic number.

It is an amenable number.

91434296825 is a deficient number, since it is larger than the sum of its proper divisors (21948371443).

91434296825 is a wasteful number, since it uses less digits than its factorization.

91434296825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133564 (or 133559 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 53.

The spelling of 91434296825 in words is "ninety-one billion, four hundred thirty-four million, two hundred ninety-six thousand, eight hundred twenty-five".