90691042245 has 16 divisors (see below), whose sum is σ = 145536256320. Its totient is φ = 48225026304.

The previous prime is 90691042241. The next prime is 90691042291. The reversal of 90691042245 is 54224019609.

It is not a de Polignac number, because 90691042245 - 2² = 90691042241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90691042197 and 90691042206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90691042241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8965375 + ... + 8975484.

It is an arithmetic number, because the mean of its divisors is an integer number (9096016020).

Almost surely, 2^90691042245 is an apocalyptic number.

It is an amenable number.

90691042245 is a deficient number, since it is larger than the sum of its proper divisors (54845214075).

90691042245 is a wasteful number, since it uses less digits than its factorization.

90691042245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17941204.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 90691042245 in words is "ninety billion, six hundred ninety-one million, forty-two thousand, two hundred forty-five".