730644561 has 12 divisors (see below), whose sum is σ = 1057829760. Its totient is φ = 485963640.

The previous prime is 730644557. The next prime is 730644571. The reversal of 730644561 is 165446037.

It is a happy number.

730644561 is a `hidden beast` number, since 7 + 3 + 0 + 644 + 5 + 6 + 1 = 666.

It is not a de Polignac number, because 730644561 - 2² = 730644557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (730644571) 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, 90301 + ... + 98058.

It is an arithmetic number, because the mean of its divisors is an integer number (88152480).

Almost surely, 2^730644561 is an apocalyptic number.

It is an amenable number.

730644561 is a deficient number, since it is larger than the sum of its proper divisors (327185199).

730644561 is a wasteful number, since it uses less digits than its factorization.

730644561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188796 (or 188793 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 730644561 is about 27030.4376768117. The cubic root of 730644561 is about 900.6762657963.

The spelling of 730644561 in words is "seven hundred thirty million, six hundred forty-four thousand, five hundred sixty-one".