6445653460 has 24 divisors (see below), whose sum is σ = 13866017256. Its totient is φ = 2515376640.

The previous prime is 6445653457. The next prime is 6445653463. The reversal of 6445653460 is 643565446.

It is an interprime number because it is at equal distance from previous prime (6445653457) and next prime (6445653463).

It can be written as a sum of positive squares in 4 ways, for example, as 133033156 + 6312620304 = 11534^2 + 79452^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445653463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3929457 + ... + 3931096.

It is an arithmetic number, because the mean of its divisors is an integer number (577750719).

Almost surely, 2^6445653460 is an apocalyptic number.

It is an amenable number.

6445653460 is an abundant number, since it is smaller than the sum of its proper divisors (7420363796).

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

6445653460 is a wasteful number, since it uses less digits than its factorization.

6445653460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7860603 (or 7860601 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 43.

The square root of 6445653460 is about 80284.8270845743. The cubic root of 6445653460 is about 1861.0397566551.

It can be divided in two parts, 644565 and 3460, that added together give a square (648025 = 805²).

The spelling of 6445653460 in words is "six billion, four hundred forty-five million, six hundred fifty-three thousand, four hundred sixty".