90531888742655 has 8 divisors (see below), whose sum is σ = 108897546366000. Its totient is φ = 72252657744256.

The previous prime is 90531888742643. The next prime is 90531888742679. The reversal of 90531888742655 is 55624788813509.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90531888742655 - 2¹⁰ = 90531888741631 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21606653930 + ... + 21606658119.

It is an arithmetic number, because the mean of its divisors is an integer number (13612193295750).

It is a 1-persistent number, because it is pandigital, but 2⋅90531888742655 = 181063777485310 is not.

Almost surely, 2^{90531888742655} is an apocalyptic number.

90531888742655 is a deficient number, since it is larger than the sum of its proper divisors (18365657623345).

90531888742655 is a wasteful number, since it uses less digits than its factorization.

90531888742655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43213312473.

The product of its (nonzero) digits is 580608000, while the sum is 71.

The spelling of 90531888742655 in words is "ninety trillion, five hundred thirty-one billion, eight hundred eighty-eight million, seven hundred forty-two thousand, six hundred fifty-five".