6440061025 has 24 divisors (see below), whose sum is σ = 8168941440. Its totient is φ = 5034173760.

The previous prime is 6440060999. The next prime is 6440061079. The reversal of 6440061025 is 5201600446.

It is not a de Polignac number, because 6440061025 - 2⁷ = 6440060897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6440060984 and 6440061002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 770167 + ... + 778483.

It is an arithmetic number, because the mean of its divisors is an integer number (340372560).

Almost surely, 2^6440061025 is an apocalyptic number.

It is an amenable number.

6440061025 is a deficient number, since it is larger than the sum of its proper divisors (1728880415).

6440061025 is a wasteful number, since it uses less digits than its factorization.

6440061025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9033 (or 9028 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 6440061025 is about 80249.9908099683. The cubic root of 6440061025 is about 1860.5013703142.

The spelling of 6440061025 in words is "six billion, four hundred forty million, sixty-one thousand, twenty-five".