90900218744 has 16 divisors (see below), whose sum is σ = 170445604320. Its totient is φ = 45448057600.

The previous prime is 90900218743. The next prime is 90900218803. The reversal of 90900218744 is 44781200909.

It is a junction number, because it is equal to n+sod(n) for n = 90900218695 and 90900218704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90900218743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59264 + ... + 430479.

It is an arithmetic number, because the mean of its divisors is an integer number (10652850270).

Almost surely, 2^90900218744 is an apocalyptic number.

It is an amenable number.

90900218744 is a deficient number, since it is larger than the sum of its proper divisors (79545385576).

90900218744 is a wasteful number, since it uses less digits than its factorization.

90900218744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512950 (or 512946 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 90900218744 in words is "ninety billion, nine hundred million, two hundred eighteen thousand, seven hundred forty-four".