445136866403647 has 16 divisors (see below), whose sum is σ = 486479796112800. Its totient is φ = 403939939325440.

The previous prime is 445136866403623. The next prime is 445136866403651. The reversal of 445136866403647 is 746304668631544.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 445136866403647 - 2³¹ = 445134718919999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445136866403347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 975245379 + ... + 975701707.

It is an arithmetic number, because the mean of its divisors is an integer number (30404987257050).

Almost surely, 2^{445136866403647} is an apocalyptic number.

445136866403647 is a deficient number, since it is larger than the sum of its proper divisors (41342929709153).

445136866403647 is a wasteful number, since it uses less digits than its factorization.

445136866403647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616106.

The product of its (nonzero) digits is 836075520, while the sum is 67.

The spelling of 445136866403647 in words is "four hundred forty-five trillion, one hundred thirty-six billion, eight hundred sixty-six million, four hundred three thousand, six hundred forty-seven".