1211644494 has 40 divisors (see below), whose sum is σ = 2717699688. Its totient is φ = 403477200.

The previous prime is 1211644477. The next prime is 1211644601. The reversal of 1211644494 is 4944461121.

It is a happy number.

1211644494 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 644 + 4 + 9 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 189144 + ... + 195444.

Almost surely, 2^1211644494 is an apocalyptic number.

1211644494 is an abundant number, since it is smaller than the sum of its proper divisors (1506055194).

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

1211644494 is a wasteful number, since it uses less digits than its factorization.

1211644494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7502 (or 7493 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 1211644494 is about 34808.6841750733. The cubic root of 1211644494 is about 1066.0847665757.

The spelling of 1211644494 in words is "one billion, two hundred eleven million, six hundred forty-four thousand, four hundred ninety-four".