6440607601 has 2 divisors, whose sum is σ = 6440607602. Its totient is φ = 6440607600.

The previous prime is 6440607583. The next prime is 6440607643. The reversal of 6440607601 is 1067060446.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6439902001 + 705600 = 80249^2 + 840^2 .

It is a cyclic number.

It is not a de Polignac number, because 6440607601 - 2⁷ = 6440607473 is a prime.

It is not a weakly prime, because it can be changed into another prime (6440607661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3220303800 + 3220303801.

It is an arithmetic number, because the mean of its divisors is an integer number (3220303801).

Almost surely, 2^6440607601 is an apocalyptic number.

It is an amenable number.

6440607601 is a deficient number, since it is larger than the sum of its proper divisors (1).

6440607601 is an equidigital number, since it uses as much as digits as its factorization.

6440607601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 6440607601 is about 80253.3961960489. The cubic root of 6440607601 is about 1860.5540031814.

The spelling of 6440607601 in words is "six billion, four hundred forty million, six hundred seven thousand, six hundred one".