1212653568 has 336 divisors, whose sum is σ = 4034149920. Its totient is φ = 322043904.

The previous prime is 1212653557. The next prime is 1212653573. The reversal of 1212653568 is 8653562121.

It is a tau number, because it is divible by the number of its divisors (336).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22880230 + ... + 22880282.

Almost surely, 2^1212653568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212653568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2017074960).

1212653568 is an abundant number, since it is smaller than the sum of its proper divisors (2821496352).

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

1212653568 is an equidigital number, since it uses as much as digits as its factorization.

1212653568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 84 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 1212653568 is about 34823.1757311133. The cubic root of 1212653568 is about 1066.3806344169.

The spelling of 1212653568 in words is "one billion, two hundred twelve million, six hundred fifty-three thousand, five hundred sixty-eight".