740644641 has 80 divisors (see below), whose sum is σ = 1250694720. Its totient is φ = 432967680.

The previous prime is 740644633. The next prime is 740644669. The reversal of 740644641 is 146446047.

740644641 is a `hidden beast` number, since 7 + 4 + 0 + 6 + 4 + 4 + 641 = 666.

It is not a de Polignac number, because 740644641 - 2³ = 740644633 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 740644596 and 740644605.

It is not an unprimeable number, because it can be changed into a prime (740644621) by changing a digit.

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 79 ways as a sum of consecutive naturals, for example, 3837441 + ... + 3837633.

It is an arithmetic number, because the mean of its divisors is an integer number (15633684).

Almost surely, 2^740644641 is an apocalyptic number.

It is an amenable number.

740644641 is a deficient number, since it is larger than the sum of its proper divisors (510050079).

740644641 is a wasteful number, since it uses less digits than its factorization.

740644641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 740644641 is about 27214.7871753574. The cubic root of 740644641 is about 904.7667422817.

The spelling of 740644641 in words is "seven hundred forty million, six hundred forty-four thousand, six hundred forty-one".