2175731404561 has 16 divisors (see below), whose sum is σ = 2576230852608. Its totient is φ = 1811412288000.

The previous prime is 2175731404549. The next prime is 2175731404571. The reversal of 2175731404561 is 1654041375712.

It is a cyclic number.

It is not a de Polignac number, because 2175731404561 - 2¹³ = 2175731396369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2175731404571) 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, 59883040 + ... + 59919361.

It is an arithmetic number, because the mean of its divisors is an integer number (161014428288).

Almost surely, 2^{2175731404561} is an apocalyptic number.

It is an amenable number.

2175731404561 is a deficient number, since it is larger than the sum of its proper divisors (400499448047).

2175731404561 is a wasteful number, since it uses less digits than its factorization.

2175731404561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119802552.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 2175731404561 in words is "two trillion, one hundred seventy-five billion, seven hundred thirty-one million, four hundred four thousand, five hundred sixty-one".