650990011905 has 24 divisors (see below), whose sum is σ = 1167292437480. Its totient is φ = 335222442240.

The previous prime is 650990011883. The next prime is 650990011937. The reversal of 650990011905 is 509110099056.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 50445609201 + 600544402704 = 224601^2 + 774948^2 .

It is not a de Polignac number, because 650990011905 - 2⁵ = 650990011873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 249420156 + ... + 249422765.

It is an arithmetic number, because the mean of its divisors is an integer number (48637184895).

Almost surely, 2^650990011905 is an apocalyptic number.

It is an amenable number.

650990011905 is a deficient number, since it is larger than the sum of its proper divisors (516302425575).

650990011905 is a wasteful number, since it uses less digits than its factorization.

650990011905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498842961 (or 498842958 counting only the distinct ones).

The product of its (nonzero) digits is 109350, while the sum is 45.

The spelling of 650990011905 in words is "six hundred fifty billion, nine hundred ninety million, eleven thousand, nine hundred five".