90217164668 has 6 divisors (see below), whose sum is σ = 157880038176. Its totient is φ = 45108582332.

The previous prime is 90217164659. The next prime is 90217164703. The reversal of 90217164668 is 86646171209.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 11277145580 + ... + 11277145587.

It is an arithmetic number, because the mean of its divisors is an integer number (26313339696).

Almost surely, 2^90217164668 is an apocalyptic number.

It is an amenable number.

90217164668 is a deficient number, since it is larger than the sum of its proper divisors (67662873508).

90217164668 is a wasteful number, since it uses less digits than its factorization.

90217164668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22554291171 (or 22554291169 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 90217164668 in words is "ninety billion, two hundred seventeen million, one hundred sixty-four thousand, six hundred sixty-eight".