90185905473 has 8 divisors (see below), whose sum is σ = 120251511936. Its totient is φ = 60122118000.

The previous prime is 90185905463. The next prime is 90185905489. The reversal of 90185905473 is 37450958109.

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

It is not a de Polignac number, because 90185905473 - 2¹³ = 90185897281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90185905463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334518 + ... + 540623.

It is an arithmetic number, because the mean of its divisors is an integer number (15031438992).

Almost surely, 2^90185905473 is an apocalyptic number.

It is an amenable number.

90185905473 is a deficient number, since it is larger than the sum of its proper divisors (30065606463).

90185905473 is a wasteful number, since it uses less digits than its factorization.

90185905473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909495.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 90185905473 in words is "ninety billion, one hundred eighty-five million, nine hundred five thousand, four hundred seventy-three".