90805640363 has 4 divisors (see below), whose sum is σ = 91212840768. Its totient is φ = 90398439960.

The previous prime is 90805640353. The next prime is 90805640491. The reversal of 90805640363 is 36304650809.

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 90805640363 - 2²² = 90801446059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90805640323) 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, 203599868 + ... + 203600313.

It is an arithmetic number, because the mean of its divisors is an integer number (22803210192).

Almost surely, 2^90805640363 is an apocalyptic number.

90805640363 is a deficient number, since it is larger than the sum of its proper divisors (407200405).

90805640363 is a wasteful number, since it uses less digits than its factorization.

90805640363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407200404.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 90805640363 in words is "ninety billion, eight hundred five million, six hundred forty thousand, three hundred sixty-three".