90331134845 has 16 divisors (see below), whose sum is σ = 130402842240. Its totient is φ = 58681278144.

The previous prime is 90331134811. The next prime is 90331134847. The reversal of 90331134845 is 54843113309.

90331134845 = 39781² + 39782² + ... + 39837².

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90331134845 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90331134847) 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, 67917482 + ... + 67918811.

It is an arithmetic number, because the mean of its divisors is an integer number (8150177640).

Almost surely, 2^90331134845 is an apocalyptic number.

90331134845 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

90331134845 is a deficient number, since it is larger than the sum of its proper divisors (40071707395).

90331134845 is a wasteful number, since it uses less digits than its factorization.

90331134845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135836324.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 90331134845 in words is "ninety billion, three hundred thirty-one million, one hundred thirty-four thousand, eight hundred forty-five".