1263674544 has 80 divisors (see below), whose sum is σ = 3566795520. Its totient is φ = 382337280.

The previous prime is 1263674539. The next prime is 1263674551. The reversal of 1263674544 is 4454763621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1263674496 and 1263674505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436269 + ... + 439155.

It is an arithmetic number, because the mean of its divisors is an integer number (44584944).

Almost surely, 2^1263674544 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 1263674544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1783397760).

1263674544 is an abundant number, since it is smaller than the sum of its proper divisors (2303120976).

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

1263674544 is a wasteful number, since it uses less digits than its factorization.

1263674544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3738 (or 3732 counting only the distinct ones).

The product of its digits is 483840, while the sum is 42.

The square root of 1263674544 is about 35548.2002919979. The cubic root of 1263674544 is about 1081.1312289645.

The spelling of 1263674544 in words is "one billion, two hundred sixty-three million, six hundred seventy-four thousand, five hundred forty-four".