1856880560461 has 4 divisors (see below), whose sum is σ = 1856962495900. Its totient is φ = 1856798625024.

The previous prime is 1856880560443. The next prime is 1856880560519. The reversal of 1856880560461 is 1640650886581.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1255899007561 + 600981552900 = 1120669^2 + 775230^2 .

It is a cyclic number.

It is not a de Polignac number, because 1856880560461 - 2⁵ = 1856880560429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1856880560396 and 1856880560405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1856880561461) 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, 40933716 + ... + 40979053.

It is an arithmetic number, because the mean of its divisors is an integer number (464240623975).

Almost surely, 2^{1856880560461} is an apocalyptic number.

It is an amenable number.

1856880560461 is a deficient number, since it is larger than the sum of its proper divisors (81935439).

1856880560461 is an equidigital number, since it uses as much as digits as its factorization.

1856880560461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81935438.

The product of its (nonzero) digits is 11059200, while the sum is 58.

The spelling of 1856880560461 in words is "one trillion, eight hundred fifty-six billion, eight hundred eighty million, five hundred sixty thousand, four hundred sixty-one".