90128648891123 has 2 divisors, whose sum is σ = 90128648891124. Its totient is φ = 90128648891122.

The previous prime is 90128648891101. The next prime is 90128648891129. The reversal of 90128648891123 is 32119884682109.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90128648891123 - 2¹⁰ = 90128648890099 is a prime.

It is a super-2 number, since 2×90128648891123² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90128648891129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45064324445561 + 45064324445562.

It is an arithmetic number, because the mean of its divisors is an integer number (45064324445562).

Almost surely, 2^{90128648891123} is an apocalyptic number.

90128648891123 is a deficient number, since it is larger than the sum of its proper divisors (1).

90128648891123 is an equidigital number, since it uses as much as digits as its factorization.

90128648891123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11943936, while the sum is 62.

The spelling of 90128648891123 in words is "ninety trillion, one hundred twenty-eight billion, six hundred forty-eight million, eight hundred ninety-one thousand, one hundred twenty-three".