2671357861 has 2 divisors, whose sum is σ = 2671357862. Its totient is φ = 2671357860.

The previous prime is 2671357853. The next prime is 2671357879. The reversal of 2671357861 is 1687531762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1914062500 + 757295361 = 43750^2 + 27519^2 .

It is a cyclic number.

It is not a de Polignac number, because 2671357861 - 2³ = 2671357853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2671357361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1335678930 + 1335678931.

It is an arithmetic number, because the mean of its divisors is an integer number (1335678931).

Almost surely, 2^2671357861 is an apocalyptic number.

It is an amenable number.

2671357861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2671357861 is an equidigital number, since it uses as much as digits as its factorization.

2671357861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 46.

The square root of 2671357861 is about 51685.1802841008. The cubic root of 2671357861 is about 1387.5352454429.

The spelling of 2671357861 in words is "two billion, six hundred seventy-one million, three hundred fifty-seven thousand, eight hundred sixty-one".