1246664644 has 24 divisors (see below), whose sum is σ = 2274148800. Its totient is φ = 597236640.

The previous prime is 1246664633. The next prime is 1246664669. The reversal of 1246664644 is 4464666421.

It is a self number, because there is not a number n which added to its sum of digits gives 1246664644.

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, 25824 + ... + 56215.

It is an arithmetic number, because the mean of its divisors is an integer number (94756200).

Almost surely, 2^1246664644 is an apocalyptic number.

It is an amenable number.

1246664644 is a deficient number, since it is larger than the sum of its proper divisors (1027484156).

1246664644 is a wasteful number, since it uses less digits than its factorization.

1246664644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82203 (or 82201 counting only the distinct ones).

The product of its digits is 663552, while the sum is 43.

The square root of 1246664644 is about 35308.1384952535. The cubic root of 1246664644 is about 1076.2583840265.

The spelling of 1246664644 in words is "one billion, two hundred forty-six million, six hundred sixty-four thousand, six hundred forty-four".