1264536768 has 112 divisors (see below), whose sum is σ = 3685982976. Its totient is φ = 379407360.

The previous prime is 1264536727. The next prime is 1264536781. The reversal of 1264536768 is 8676354621.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 214630 + ... + 220442.

Almost surely, 2^1264536768 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 1264536768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1842991488).

1264536768 is an abundant number, since it is smaller than the sum of its proper divisors (2421446208).

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

1264536768 is a wasteful number, since it uses less digits than its factorization.

1264536768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942 (or 5932 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The square root of 1264536768 is about 35560.3257577880. The cubic root of 1264536768 is about 1081.3770637180.

The spelling of 1264536768 in words is "one billion, two hundred sixty-four million, five hundred thirty-six thousand, seven hundred sixty-eight".