90550809433390 has 64 divisors (see below), whose sum is σ = 169329113487360. Its totient is φ = 34827210875520.

The previous prime is 90550809433367. The next prime is 90550809433393. The reversal of 90550809433390 is 9333490805509.

It is a super-2 number, since 2×90550809433390² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90550809433393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84147117 + ... + 85216423.

It is an arithmetic number, because the mean of its divisors is an integer number (2645767398240).

Almost surely, 2^{90550809433390} is an apocalyptic number.

90550809433390 is a deficient number, since it is larger than the sum of its proper divisors (78778304053970).

90550809433390 is a wasteful number, since it uses less digits than its factorization.

90550809433390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071097.

The product of its (nonzero) digits is 15746400, while the sum is 58.

The spelling of 90550809433390 in words is "ninety trillion, five hundred fifty billion, eight hundred nine million, four hundred thirty-three thousand, three hundred ninety".