90068209051 has 4 divisors (see below), whose sum is σ = 90068975992. Its totient is φ = 90067442112.

The previous prime is 90068209043. The next prime is 90068209073. The reversal of 90068209051 is 15090286009.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 90068209051 - 2³ = 90068209043 is a prime.

It is a super-2 number, since 2×90068209051² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90068208995 and 90068209013.

It is not an unprimeable number, because it can be changed into a prime (90068209081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166326 + ... + 455851.

It is an arithmetic number, because the mean of its divisors is an integer number (22517243998).

Almost surely, 2^90068209051 is an apocalyptic number.

90068209051 is a deficient number, since it is larger than the sum of its proper divisors (766941).

90068209051 is a wasteful number, since it uses less digits than its factorization.

90068209051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766940.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 90068209051 in words is "ninety billion, sixty-eight million, two hundred nine thousand, fifty-one".