646104011 has 8 divisors (see below), whose sum is σ = 740736480. Its totient is φ = 552054528.

The previous prime is 646104007. The next prime is 646104013. The reversal of 646104011 is 110401646.

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

It is a cyclic number.

It is not a de Polignac number, because 646104011 - 2² = 646104007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646104013) 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, 143366 + ... + 147803.

It is an arithmetic number, because the mean of its divisors is an integer number (92592060).

Almost surely, 2^646104011 is an apocalyptic number.

646104011 is a deficient number, since it is larger than the sum of its proper divisors (94632469).

646104011 is a wasteful number, since it uses less digits than its factorization.

646104011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291493.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 646104011 is about 25418.5761009542. The cubic root of 646104011 is about 864.5049395240.

Adding to 646104011 its reverse (110401646), we get a palindrome (756505657).

The spelling of 646104011 in words is "six hundred forty-six million, one hundred four thousand, eleven".