1263481164 has 144 divisors (see below), whose sum is σ = 3626532000. Its totient is φ = 367395840.

The previous prime is 1263481097. The next prime is 1263481181. The reversal of 1263481164 is 4611843621.

1263481164 is a `hidden beast` number, since 1 + 2 + 634 + 8 + 1 + 16 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3088992 + ... + 3089400.

It is an arithmetic number, because the mean of its divisors is an integer number (25184250).

Almost surely, 2^1263481164 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 1263481164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1813266000).

1263481164 is an abundant number, since it is smaller than the sum of its proper divisors (2363050836).

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

1263481164 is a wasteful number, since it uses less digits than its factorization.

1263481164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 723 counting only the distinct ones).

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

The square root of 1263481164 is about 35545.4802190096. The cubic root of 1263481164 is about 1081.0760776801.

The spelling of 1263481164 in words is "one billion, two hundred sixty-three million, four hundred eighty-one thousand, one hundred sixty-four".