90083556381521 has 4 divisors (see below), whose sum is σ = 90083575663344. Its totient is φ = 90083537099700.

The previous prime is 90083556381493. The next prime is 90083556381527. The reversal of 90083556381521 is 12518365538009.

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 90083556381521 - 2⁴² = 85685509870417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90083556381527) 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, 2282126 + ... + 13615256.

It is an arithmetic number, because the mean of its divisors is an integer number (22520893915836).

Almost surely, 2^{90083556381521} is an apocalyptic number.

It is an amenable number.

90083556381521 is a deficient number, since it is larger than the sum of its proper divisors (19281823).

90083556381521 is a wasteful number, since it uses less digits than its factorization.

90083556381521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19281822.

The product of its (nonzero) digits is 7776000, while the sum is 56.

The spelling of 90083556381521 in words is "ninety trillion, eighty-three billion, five hundred fifty-six million, three hundred eighty-one thousand, five hundred twenty-one".