4251085801645 has 16 divisors (see below), whose sum is σ = 5404212209088. Its totient is φ = 3199138965760.

The previous prime is 4251085801583. The next prime is 4251085801687. The reversal of 4251085801645 is 5461085801524.

4251085801645 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4251085801645 - 2⁹ = 4251085801133 is a prime.

It is a super-3 number, since 3×4251085801645³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12950851 + ... + 13275040.

It is an arithmetic number, because the mean of its divisors is an integer number (337763263068).

Almost surely, 2^{4251085801645} is an apocalyptic number.

It is an amenable number.

4251085801645 is a deficient number, since it is larger than the sum of its proper divisors (1153126407443).

4251085801645 is a wasteful number, since it uses less digits than its factorization.

4251085801645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26227820.

The product of its (nonzero) digits is 1536000, while the sum is 49.

The spelling of 4251085801645 in words is "four trillion, two hundred fifty-one billion, eighty-five million, eight hundred one thousand, six hundred forty-five".