646461835 has 16 divisors (see below), whose sum is σ = 796636512. Its totient is φ = 503424000.

The previous prime is 646461821. The next prime is 646461853. The reversal of 646461835 is 538164646.

It is a happy number.

It is not a de Polignac number, because 646461835 - 2²¹ = 644364683 is a prime.

It is a super-2 number, since 2×646461835² = 835825808223134450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646461791 and 646461800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18660 + ... + 40510.

It is an arithmetic number, because the mean of its divisors is an integer number (49789782).

Almost surely, 2^646461835 is an apocalyptic number.

646461835 is a deficient number, since it is larger than the sum of its proper divisors (150174677).

646461835 is a wasteful number, since it uses less digits than its factorization.

646461835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22014.

The product of its digits is 414720, while the sum is 43.

The square root of 646461835 is about 25425.6137585703. The cubic root of 646461835 is about 864.6645028563.

The spelling of 646461835 in words is "six hundred forty-six million, four hundred sixty-one thousand, eight hundred thirty-five".