1264065650 has 24 divisors (see below), whose sum is σ = 2352589380. Its totient is φ = 505319360.

The previous prime is 1264065643. The next prime is 1264065653. The reversal of 1264065650 is 565604621.

It can be written as a sum of positive squares in 6 ways, for example, as 619362769 + 644702881 = 24887^2 + 25391^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1264065650.

It is not an unprimeable number, because it can be changed into a prime (1264065653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87116 + ... + 100584.

Almost surely, 2^1264065650 is an apocalyptic number.

1264065650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1264065650 is a deficient number, since it is larger than the sum of its proper divisors (1088523730).

1264065650 is a wasteful number, since it uses less digits than its factorization.

1264065650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15358 (or 15353 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 1264065650 is about 35553.7009325330. The cubic root of 1264065650 is about 1081.2427538022.

The spelling of 1264065650 in words is "one billion, two hundred sixty-four million, sixty-five thousand, six hundred fifty".