6405554277745 has 24 divisors (see below), whose sum is σ = 8973911220264. Its totient is φ = 4376523062016.

The previous prime is 6405554277737. The next prime is 6405554277751. The reversal of 6405554277745 is 5477724555046.

It can be written as a sum of positive squares in 4 ways, for example, as 316168919521 + 6089385358224 = 562289^2 + 2467668^2 .

It is not a de Polignac number, because 6405554277745 - 2³ = 6405554277737 is a prime.

It is a super-2 number, since 2×6405554277745² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47125492 + ... + 47261221.

It is an arithmetic number, because the mean of its divisors is an integer number (373912967511).

Almost surely, 2^{6405554277745} is an apocalyptic number.

It is an amenable number.

6405554277745 is a deficient number, since it is larger than the sum of its proper divisors (2568356942519).

6405554277745 is a wasteful number, since it uses less digits than its factorization.

6405554277745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94387009 (or 94387002 counting only the distinct ones).

The product of its (nonzero) digits is 164640000, while the sum is 61.

The spelling of 6405554277745 in words is "six trillion, four hundred five billion, five hundred fifty-four million, two hundred seventy-seven thousand, seven hundred forty-five".