1205610664 has 16 divisors (see below), whose sum is σ = 2321615700. Its totient is φ = 586513152.

The previous prime is 1205610611. The next prime is 1205610671. The reversal of 1205610664 is 4660165021.

It can be written as a sum of positive squares in 2 ways, for example, as 1193149764 + 12460900 = 34542^2 + 3530^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2036209 + ... + 2036800.

Almost surely, 2^1205610664 is an apocalyptic number.

It is an amenable number.

1205610664 is a deficient number, since it is larger than the sum of its proper divisors (1116005036).

1205610664 is a wasteful number, since it uses less digits than its factorization.

1205610664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073052 (or 4073048 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1205610664 is about 34721.9046712590. The cubic root of 1205610664 is about 1064.3121669643.

Adding to 1205610664 its reverse (4660165021), we get a palindrome (5865775685).

The spelling of 1205610664 in words is "one billion, two hundred five million, six hundred ten thousand, six hundred sixty-four".