9090812350561 has 4 divisors (see below), whose sum is σ = 9109327243824. Its totient is φ = 9072297457300.

The previous prime is 9090812350559. The next prime is 9090812350591. The reversal of 9090812350561 is 1650532180909.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9090812350561 - 2¹ = 9090812350559 is a prime.

It is a super-2 number, since 2×9090812350561² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9090812350591) 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, 9257445895 + ... + 9257446876.

It is an arithmetic number, because the mean of its divisors is an integer number (2277331810956).

Almost surely, 2^{9090812350561} is an apocalyptic number.

It is an amenable number.

9090812350561 is a deficient number, since it is larger than the sum of its proper divisors (18514893263).

9090812350561 is a wasteful number, since it uses less digits than its factorization.

9090812350561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18514893262.

The product of its (nonzero) digits is 583200, while the sum is 49.

The spelling of 9090812350561 in words is "nine trillion, ninety billion, eight hundred twelve million, three hundred fifty thousand, five hundred sixty-one".