1271633016 has 64 divisors (see below), whose sum is σ = 3321803520. Its totient is φ = 404898560.

The previous prime is 1271633009. The next prime is 1271633029. The reversal of 1271633016 is 6103361721.

1271633016 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 657571 + ... + 659501.

It is an arithmetic number, because the mean of its divisors is an integer number (51903180).

Almost surely, 2^1271633016 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 1271633016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1660901760).

1271633016 is an abundant number, since it is smaller than the sum of its proper divisors (2050170504).

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

1271633016 is a wasteful number, since it uses less digits than its factorization.

1271633016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156 (or 3152 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 1271633016 is about 35659.9637689104. The cubic root of 1271633016 is about 1083.3960929532.

Adding to 1271633016 its reverse (6103361721), we get a palindrome (7374994737).

The spelling of 1271633016 in words is "one billion, two hundred seventy-one million, six hundred thirty-three thousand, sixteen".