90180910044 has 36 divisors (see below), whose sum is σ = 231359654344. Its totient is φ = 29611641312.

The previous prime is 90180910019. The next prime is 90180910051. The reversal of 90180910044 is 44001908109.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 90180909990 and 90180910008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18691807 + ... + 18696630.

Almost surely, 2^90180910044 is an apocalyptic number.

It is an amenable number.

90180910044 is an abundant number, since it is smaller than the sum of its proper divisors (141178744300).

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

90180910044 is a wasteful number, since it uses less digits than its factorization.

90180910044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37388514 (or 37388509 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 90180910044 in words is "ninety billion, one hundred eighty million, nine hundred ten thousand, forty-four".