1264165436 has 6 divisors (see below), whose sum is σ = 2212289520. Its totient is φ = 632082716.

The previous prime is 1264165433. The next prime is 1264165489. The reversal of 1264165436 is 6345614621.

It is a super-2 number, since 2×1264165436² = 3196228499154140192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1264165436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264165433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158020676 + ... + 158020683.

It is an arithmetic number, because the mean of its divisors is an integer number (368714920).

Almost surely, 2^1264165436 is an apocalyptic number.

It is an amenable number.

1264165436 is a deficient number, since it is larger than the sum of its proper divisors (948124084).

1264165436 is a wasteful number, since it uses less digits than its factorization.

1264165436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316041363 (or 316041361 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 1264165436 is about 35555.1042186632. The cubic root of 1264165436 is about 1081.2712043421.

The spelling of 1264165436 in words is "one billion, two hundred sixty-four million, one hundred sixty-five thousand, four hundred thirty-six".