90545145091 has 4 divisors (see below), whose sum is σ = 90608068800. Its totient is φ = 90482221384.

The previous prime is 90545145079. The next prime is 90545145121. The reversal of 90545145091 is 19054154509.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90545145091 - 2¹⁵ = 90545112323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90545115091) 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, 31459696 + ... + 31462573.

It is an arithmetic number, because the mean of its divisors is an integer number (22652017200).

Almost surely, 2^90545145091 is an apocalyptic number.

90545145091 is a deficient number, since it is larger than the sum of its proper divisors (62923709).

90545145091 is a wasteful number, since it uses less digits than its factorization.

90545145091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62923708.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 90545145091 in words is "ninety billion, five hundred forty-five million, one hundred forty-five thousand, ninety-one".