1364635521 has 12 divisors (see below), whose sum is σ = 1989563472. Its totient is φ = 901253976.

The previous prime is 1364635507. The next prime is 1364635541. The reversal of 1364635521 is 1255364631.

1364635521 is a `hidden beast` number, since 1 + 3 + 646 + 3 + 5 + 5 + 2 + 1 = 666.

It is not a de Polignac number, because 1364635521 - 2⁶ = 1364635457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1364635541) 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, 707571 + ... + 709496.

It is an arithmetic number, because the mean of its divisors is an integer number (165796956).

Almost surely, 2^1364635521 is an apocalyptic number.

It is an amenable number.

1364635521 is a deficient number, since it is larger than the sum of its proper divisors (624927951).

1364635521 is a wasteful number, since it uses less digits than its factorization.

1364635521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417180 (or 1417177 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 1364635521 is about 36940.9734712013. The cubic root of 1364635521 is about 1109.1890082968.

The spelling of 1364635521 in words is "one billion, three hundred sixty-four million, six hundred thirty-five thousand, five hundred twenty-one".