1264700544 has 64 divisors (see below), whose sum is σ = 3385943040. Its totient is φ = 418231296.

The previous prime is 1264700539. The next prime is 1264700551. The reversal of 1264700544 is 4450074621.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35802 + ... + 61734.

It is an arithmetic number, because the mean of its divisors is an integer number (52905360).

Almost surely, 2^1264700544 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 1264700544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1692971520).

1264700544 is an abundant number, since it is smaller than the sum of its proper divisors (2121242496).

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

1264700544 is a wasteful number, since it uses less digits than its factorization.

1264700544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26077 (or 26065 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 1264700544 is about 35562.6284742846. The cubic root of 1264700544 is about 1081.4237464162.

The spelling of 1264700544 in words is "one billion, two hundred sixty-four million, seven hundred thousand, five hundred forty-four".