6442551001 has 4 divisors (see below), whose sum is σ = 6448149504. Its totient is φ = 6436952500.

The previous prime is 6442550993. The next prime is 6442551007. The reversal of 6442551001 is 1001552446.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6442551001 - 2³ = 6442550993 is a prime.

It is a super-2 number, since 2×6442551001² = 83012926800972204002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6442551007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2797525 + ... + 2799826.

It is an arithmetic number, because the mean of its divisors is an integer number (1612037376).

Almost surely, 2^6442551001 is an apocalyptic number.

It is an amenable number.

6442551001 is a deficient number, since it is larger than the sum of its proper divisors (5598503).

6442551001 is a wasteful number, since it uses less digits than its factorization.

6442551001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5598502.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 6442551001 is about 80265.5031816284. The cubic root of 6442551001 is about 1860.7411199492.

The spelling of 6442551001 in words is "six billion, four hundred forty-two million, five hundred fifty-one thousand, one".