2686104561 has 16 divisors (see below), whose sum is σ = 4160213888. Its totient is φ = 1509753600.

The previous prime is 2686104559. The next prime is 2686104583. The reversal of 2686104561 is 1654016862.

It is a happy number.

It is not a de Polignac number, because 2686104561 - 2¹ = 2686104559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2686104511) 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, 1047160 + ... + 1049721.

It is an arithmetic number, because the mean of its divisors is an integer number (260013368).

Almost surely, 2^2686104561 is an apocalyptic number.

2686104561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2686104561 is a deficient number, since it is larger than the sum of its proper divisors (1474109327).

2686104561 is a wasteful number, since it uses less digits than its factorization.

2686104561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096952.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 2686104561 is about 51827.6428269702. The cubic root of 2686104561 is about 1390.0837658057.

The spelling of 2686104561 in words is "two billion, six hundred eighty-six million, one hundred four thousand, five hundred sixty-one".