90000000010 has 8 divisors (see below), whose sum is σ = 162000000036. Its totient is φ = 36000000000.

The previous prime is 89999999993. The next prime is 90000000019. The reversal of 90000000010 is 1000000009.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 84403613529 + 5596386481 = 290523^2 + 74809^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 9000000001 = 90000000010 / (9 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 1 + 0).

It is not an unprimeable number, because it can be changed into a prime (90000000019) 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, 4499999991 + ... + 4500000010.

Almost surely, 2^90000000010 is an apocalyptic number.

90000000010 is a deficient number, since it is larger than the sum of its proper divisors (72000000026).

90000000010 is a wasteful number, since it uses less digits than its factorization.

90000000010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9000000008.

The product of its (nonzero) digits is 9, while the sum is 10.

Subtracting from 90000000010 its sum of digits (10), we obtain a square (90000000000 = 300000²).

Adding to 90000000010 its reverse (1000000009), we get a palindrome (91000000019).

The spelling of 90000000010 in words is "ninety billion, ten", and thus it is an aban number and an uban number.