90531558720895 has 4 divisors (see below), whose sum is σ = 108637870465080. Its totient is φ = 72425246976712.

The previous prime is 90531558720851. The next prime is 90531558720923. The reversal of 90531558720895 is 59802785513509.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90531558720895 - 2²¹ = 90531556623743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90531558720895.

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 3 ways as a sum of consecutive naturals, for example, 9053155872085 + ... + 9053155872094.

It is an arithmetic number, because the mean of its divisors is an integer number (27159467616270).

Almost surely, 2^{90531558720895} is an apocalyptic number.

90531558720895 is a deficient number, since it is larger than the sum of its proper divisors (18106311744185).

90531558720895 is a wasteful number, since it uses less digits than its factorization.

90531558720895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18106311744184.

The product of its (nonzero) digits is 136080000, while the sum is 67.

The spelling of 90531558720895 in words is "ninety trillion, five hundred thirty-one billion, five hundred fifty-eight million, seven hundred twenty thousand, eight hundred ninety-five".