90823017775 has 36 divisors (see below), whose sum is σ = 131047081200. Its totient is φ = 62259859200.

The previous prime is 90823017773. The next prime is 90823017799. The reversal of 90823017775 is 57771032809.

It is a happy number.

It is not a de Polignac number, because 90823017775 - 2¹ = 90823017773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90823017773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4950870 + ... + 4969180.

It is an arithmetic number, because the mean of its divisors is an integer number (3640196700).

Almost surely, 2^90823017775 is an apocalyptic number.

90823017775 is a deficient number, since it is larger than the sum of its proper divisors (40224063425).

90823017775 is a wasteful number, since it uses less digits than its factorization.

90823017775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22384 (or 22372 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 49.

The spelling of 90823017775 in words is "ninety billion, eight hundred twenty-three million, seventeen thousand, seven hundred seventy-five".