90049217450 has 48 divisors (see below), whose sum is σ = 168626707200. Its totient is φ = 35776312320.

The previous prime is 90049217431. The next prime is 90049217491. The reversal of 90049217450 is 5471294009.

It is a junction number, because it is equal to n+sod(n) for n = 90049217398 and 90049217407.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4997357 + ... + 5015343.

It is an arithmetic number, because the mean of its divisors is an integer number (3513056400).

Almost surely, 2^90049217450 is an apocalyptic number.

90049217450 is a deficient number, since it is larger than the sum of its proper divisors (78577489750).

90049217450 is a wasteful number, since it uses less digits than its factorization.

90049217450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18671 (or 18666 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 90049217450 in words is "ninety billion, forty-nine million, two hundred seventeen thousand, four hundred fifty".