90165674838 has 32 divisors (see below), whose sum is σ = 181981209600. Its totient is φ = 29780406656.

The previous prime is 90165674831. The next prime is 90165674849. The reversal of 90165674838 is 83847656109.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90165674831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2503603 + ... + 2539361.

It is an arithmetic number, because the mean of its divisors is an integer number (5686912800).

Almost surely, 2^90165674838 is an apocalyptic number.

90165674838 is an abundant number, since it is smaller than the sum of its proper divisors (91815534762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90165674838 is a wasteful number, since it uses less digits than its factorization.

90165674838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39596.

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 90165674838 in words is "ninety billion, one hundred sixty-five million, six hundred seventy-four thousand, eight hundred thirty-eight".