650401646 has 4 divisors (see below), whose sum is σ = 975602472. Its totient is φ = 325200822.

The previous prime is 650401627. The next prime is 650401679. The reversal of 650401646 is 646104056.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×650401646² = 846044602239018632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162600410 + ... + 162600413.

It is an arithmetic number, because the mean of its divisors is an integer number (243900618).

Almost surely, 2^650401646 is an apocalyptic number.

650401646 is a deficient number, since it is larger than the sum of its proper divisors (325200826).

650401646 is a wasteful number, since it uses less digits than its factorization.

650401646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325200825.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 650401646 is about 25502.9732776396. The cubic root of 650401646 is about 866.4174898712.

The spelling of 650401646 in words is "six hundred fifty million, four hundred one thousand, six hundred forty-six".