1264766616 has 256 divisors, whose sum is σ = 3870720000. Its totient is φ = 381303936.

The previous prime is 1264766609. The next prime is 1264766621. The reversal of 1264766616 is 6166674621.

Its product of digits (435456) is a multiple of the sum of its prime factors (243).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15238111 + ... + 15238193.

It is an arithmetic number, because the mean of its divisors is an integer number (15120000).

Almost surely, 2^1264766616 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 1264766616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1935360000).

1264766616 is an abundant number, since it is smaller than the sum of its proper divisors (2605953384).

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

1264766616 is a wasteful number, since it uses less digits than its factorization.

1264766616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 233 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 1264766616 is about 35563.5574148594. The cubic root of 1264766616 is about 1081.4425784329.

The spelling of 1264766616 in words is "one billion, two hundred sixty-four million, seven hundred sixty-six thousand, six hundred sixteen".