6401650 has 12 divisors (see below), whose sum is σ = 11907162. Its totient is φ = 2560640.

The previous prime is 6401621. The next prime is 6401669. The reversal of 6401650 is 561046.

It can be written as a sum of positive squares in 3 ways, for example, as 4635409 + 1766241 = 2153^2 + 1329^2 .

It is a super-2 number, since 2×6401650² = 81962245445000, 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 in 5 ways as a sum of consecutive naturals, for example, 63967 + ... + 64066.

Almost surely, 2^6401650 is an apocalyptic number.

6401650 is a deficient number, since it is larger than the sum of its proper divisors (5505512).

6401650 is a wasteful number, since it uses less digits than its factorization.

6401650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128045 (or 128040 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 6401650 is about 2530.1482170023. The cubic root of 6401650 is about 185.6795074352.

Adding to 6401650 its reverse (561046), we get a palindrome (6962696).

The spelling of 6401650 in words is "six million, four hundred one thousand, six hundred fifty".