745659648 has 144 divisors (see below), whose sum is σ = 2219293440. Its totient is φ = 246951936.

The previous prime is 745659601. The next prime is 745659697. The reversal of 745659648 is 846956547.

745659648 is a `hidden beast` number, since 7 + 4 + 5 + 6 + 596 + 48 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 745659594 and 745659603.

It is a congruent number.

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, 1610265 + ... + 1610727.

It is an arithmetic number, because the mean of its divisors is an integer number (15411760).

Almost surely, 2^745659648 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 745659648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1109646720).

745659648 is an abundant number, since it is smaller than the sum of its proper divisors (1473633792).

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

745659648 is a wasteful number, since it uses less digits than its factorization.

745659648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721 (or 701 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The square root of 745659648 is about 27306.7692706406. The cubic root of 745659648 is about 906.8042505551.

The spelling of 745659648 in words is "seven hundred forty-five million, six hundred fifty-nine thousand, six hundred forty-eight".