646120601 has 8 divisors (see below), whose sum is σ = 750529344. Its totient is φ = 544738320.

The previous prime is 646120583. The next prime is 646120627. The reversal of 646120601 is 106021646.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-646120601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646110601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 756155 + ... + 757008.

It is an arithmetic number, because the mean of its divisors is an integer number (93816168).

Almost surely, 2^646120601 is an apocalyptic number.

646120601 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

646120601 is a deficient number, since it is larger than the sum of its proper divisors (104408743).

646120601 is a wasteful number, since it uses less digits than its factorization.

646120601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513231.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 646120601 is about 25418.9024349990. The cubic root of 646120601 is about 864.5123387528.

The spelling of 646120601 in words is "six hundred forty-six million, one hundred twenty thousand, six hundred one".