1213277568 has 32 divisors (see below), whose sum is σ = 3222769560. Its totient is φ = 404425728.

The previous prime is 1213277567. The next prime is 1213277579. The reversal of 1213277568 is 8657723121.

It is a tau number, because it is divible by the number of its divisors (32).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213277563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1579405 + ... + 1580172.

Almost surely, 2^1213277568 is an apocalyptic number.

It is an amenable number.

1213277568 is an abundant number, since it is smaller than the sum of its proper divisors (2009491992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213277568 is an equidigital number, since it uses as much as digits as its factorization.

1213277568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159594 (or 3159582 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 1213277568 is about 34832.1341292778. The cubic root of 1213277568 is about 1066.5635136359.

The spelling of 1213277568 in words is "one billion, two hundred thirteen million, two hundred seventy-seven thousand, five hundred sixty-eight".