1263476646 has 48 divisors (see below), whose sum is σ = 2795790816. Its totient is φ = 412234368.

The previous prime is 1263476633. The next prime is 1263476647. The reversal of 1263476646 is 6466743621.

It is a happy number.

1263476646 is a `hidden beast` number, since 1 + 2 + 634 + 7 + 6 + 6 + 4 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263476647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 478546 + ... + 481178.

It is an arithmetic number, because the mean of its divisors is an integer number (58245642).

Almost surely, 2^1263476646 is an apocalyptic number.

1263476646 is an abundant number, since it is smaller than the sum of its proper divisors (1532314170).

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

1263476646 is a wasteful number, since it uses less digits than its factorization.

1263476646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3197 (or 3194 counting only the distinct ones).

The product of its digits is 870912, while the sum is 45.

The square root of 1263476646 is about 35545.4166665690. The cubic root of 1263476646 is about 1081.0747890954.

The spelling of 1263476646 in words is "one billion, two hundred sixty-three million, four hundred seventy-six thousand, six hundred forty-six".