6406605436645 has 16 divisors (see below), whose sum is σ = 7702665265152. Its totient is φ = 5115461497920.

The previous prime is 6406605436579. The next prime is 6406605436669. The reversal of 6406605436645 is 5466345066046.

It is not a de Polignac number, because 6406605436645 - 2²³ = 6406597048037 is a prime.

It is a super-2 number, since 2×6406605436645² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17355619 + ... + 17720911.

It is an arithmetic number, because the mean of its divisors is an integer number (481416579072).

Almost surely, 2^{6406605436645} is an apocalyptic number.

It is an amenable number.

6406605436645 is a deficient number, since it is larger than the sum of its proper divisors (1296059828507).

6406605436645 is a wasteful number, since it uses less digits than its factorization.

6406605436645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372012.

The product of its (nonzero) digits is 37324800, while the sum is 55.

The spelling of 6406605436645 in words is "six trillion, four hundred six billion, six hundred five million, four hundred thirty-six thousand, six hundred forty-five".