6460440646 has 16 divisors (see below), whose sum is σ = 10750812480. Its totient is φ = 2886791080.

The previous prime is 6460440617. The next prime is 6460440661.

It is a happy number.

6460440646 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6460440599 and 6460440608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2487316 + ... + 2489911.

It is an arithmetic number, because the mean of its divisors is an integer number (671925780).

Almost surely, 2^6460440646 is an apocalyptic number.

6460440646 is a deficient number, since it is larger than the sum of its proper divisors (4290371834).

6460440646 is a wasteful number, since it uses less digits than its factorization.

6460440646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4977299.

The product of its (nonzero) digits is 331776, while the sum is 40.

The square root of 6460440646 is about 80376.8663609126. The cubic root of 6460440646 is about 1862.4618272794.

The spelling of 6460440646 in words is "six billion, four hundred sixty million, four hundred forty thousand, six hundred forty-six".