1211563064 has 8 divisors (see below), whose sum is σ = 2271680760. Its totient is φ = 605781528.

The previous prime is 1211563037. The next prime is 1211563069. The reversal of 1211563064 is 4603651121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211563069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75722684 + ... + 75722699.

It is an arithmetic number, because the mean of its divisors is an integer number (283960095).

Almost surely, 2^1211563064 is an apocalyptic number.

It is an amenable number.

1211563064 is a deficient number, since it is larger than the sum of its proper divisors (1060117696).

1211563064 is a wasteful number, since it uses less digits than its factorization.

1211563064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151445389 (or 151445385 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1211563064 is about 34807.5144760438. The cubic root of 1211563064 is about 1066.0608835451.

The spelling of 1211563064 in words is "one billion, two hundred eleven million, five hundred sixty-three thousand, sixty-four".