1771286606461 has 4 divisors (see below), whose sum is σ = 1776220552800. Its totient is φ = 1766352660124.

The previous prime is 1771286606459. The next prime is 1771286606503. The reversal of 1771286606461 is 1646066821771.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1771286606461 - 2¹ = 1771286606459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1771286606161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2466972631 + ... + 2466973348.

It is an arithmetic number, because the mean of its divisors is an integer number (444055138200).

Almost surely, 2^{1771286606461} is an apocalyptic number.

It is an amenable number.

1771286606461 is a deficient number, since it is larger than the sum of its proper divisors (4933946339).

1771286606461 is an equidigital number, since it uses as much as digits as its factorization.

1771286606461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933946338.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 1771286606461 in words is "one trillion, seven hundred seventy-one billion, two hundred eighty-six million, six hundred six thousand, four hundred sixty-one".