6445550361623 has 12 divisors (see below), whose sum is σ = 6804613670400. Its totient is φ = 6104543325696.

The previous prime is 6445550361473. The next prime is 6445550361643. The reversal of 6445550361623 is 3261630555446.

It is not a de Polignac number, because 6445550361623 - 2²⁶ = 6445483252759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445550361643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1334423 + ... + 3830376.

It is an arithmetic number, because the mean of its divisors is an integer number (567051139200).

Almost surely, 2^{6445550361623} is an apocalyptic number.

6445550361623 is a deficient number, since it is larger than the sum of its proper divisors (359063308777).

6445550361623 is a wasteful number, since it uses less digits than its factorization.

6445550361623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168294 (or 5168275 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 50.

The spelling of 6445550361623 in words is "six trillion, four hundred forty-five billion, five hundred fifty million, three hundred sixty-one thousand, six hundred twenty-three".