90531973933847 has 48 divisors (see below), whose sum is σ = 94210805445120. Its totient is φ = 86975405637120.

The previous prime is 90531973933811. The next prime is 90531973933867. The reversal of 90531973933847 is 74833937913509.

It is not a de Polignac number, because 90531973933847 - 2¹⁰ = 90531973932823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90531973933867) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19498592108 + ... + 19498596750.

It is an arithmetic number, because the mean of its divisors is an integer number (1962725113440).

Almost surely, 2^{90531973933847} is an apocalyptic number.

90531973933847 is a deficient number, since it is larger than the sum of its proper divisors (3678831511273).

90531973933847 is a wasteful number, since it uses less digits than its factorization.

90531973933847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5544 (or 5483 counting only the distinct ones).

The product of its (nonzero) digits is 462944160, while the sum is 71.

The spelling of 90531973933847 in words is "ninety trillion, five hundred thirty-one billion, nine hundred seventy-three million, nine hundred thirty-three thousand, eight hundred forty-seven".