2705221560645 has 48 divisors (see below), whose sum is σ = 4865379023232. Its totient is φ = 1441995670080.

The previous prime is 2705221560637. The next prime is 2705221560647. The reversal of 2705221560645 is 5460651225072.

2705221560645 is a `hidden beast` number, since 2 + 7 + 0 + 5 + 2 + 21 + 560 + 64 + 5 = 666.

It is not a de Polignac number, because 2705221560645 - 2³ = 2705221560637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2705221560645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2705221560647) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1616659 + ... + 2832671.

It is an arithmetic number, because the mean of its divisors is an integer number (101362062984).

Almost surely, 2^{2705221560645} is an apocalyptic number.

It is an amenable number.

2705221560645 is a deficient number, since it is larger than the sum of its proper divisors (2160157462587).

2705221560645 is a wasteful number, since it uses less digits than its factorization.

2705221560645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217864 (or 1217852 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 45.

The spelling of 2705221560645 in words is "two trillion, seven hundred five billion, two hundred twenty-one million, five hundred sixty thousand, six hundred forty-five".