1264321764 has 48 divisors (see below), whose sum is σ = 3281456640. Its totient is φ = 420979680.

The previous prime is 1264321759. The next prime is 1264321771. The reversal of 1264321764 is 4671234621.

1264321764 is a `hidden beast` number, since 1 + 2 + 643 + 2 + 1 + 7 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101122 + ... + 112934.

It is an arithmetic number, because the mean of its divisors is an integer number (68363680).

Almost surely, 2^1264321764 is an apocalyptic number.

It is an amenable number.

1264321764 is an abundant number, since it is smaller than the sum of its proper divisors (2017134876).

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

1264321764 is a wasteful number, since it uses less digits than its factorization.

1264321764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12817 (or 12809 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 1264321764 is about 35557.3025411096. The cubic root of 1264321764 is about 1081.3157728753.

The spelling of 1264321764 in words is "one billion, two hundred sixty-four million, three hundred twenty-one thousand, seven hundred sixty-four".