650091394661890 has 16 divisors (see below), whose sum is σ = 1171437812377920. Its totient is φ = 259753601867760.

The previous prime is 650091394661857. The next prime is 650091394661897. The reversal of 650091394661890 is 98166493190056.

It is not an unprimeable number, because it can be changed into a prime (650091394661897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35369489976 + ... + 35369508355.

It is an arithmetic number, because the mean of its divisors is an integer number (73214863273620).

Almost surely, 2^{650091394661890} is an apocalyptic number.

650091394661890 is a deficient number, since it is larger than the sum of its proper divisors (521346417716030).

650091394661890 is a wasteful number, since it uses less digits than its factorization.

650091394661890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70738999257.

The product of its (nonzero) digits is 75582720, while the sum is 67.

The spelling of 650091394661890 in words is "six hundred fifty trillion, ninety-one billion, three hundred ninety-four million, six hundred sixty-one thousand, eight hundred ninety".