2481356861 has 4 divisors (see below), whose sum is σ = 2500895232. Its totient is φ = 2461818492.

The previous prime is 2481356849. The next prime is 2481356893. The reversal of 2481356861 is 1686531842.

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 2481356861 - 2²² = 2477162557 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 (2481356821) 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, 9768995 + ... + 9769248.

It is an arithmetic number, because the mean of its divisors is an integer number (625223808).

Almost surely, 2^2481356861 is an apocalyptic number.

It is an amenable number.

2481356861 is a deficient number, since it is larger than the sum of its proper divisors (19538371).

2481356861 is a wasteful number, since it uses less digits than its factorization.

2481356861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19538370.

The product of its digits is 276480, while the sum is 44.

The square root of 2481356861 is about 49813.2197413498. The cubic root of 2481356861 is about 1353.8267029099.

The spelling of 2481356861 in words is "two billion, four hundred eighty-one million, three hundred fifty-six thousand, eight hundred sixty-one".