2671357781 has 8 divisors (see below), whose sum is σ = 2881865304. Its totient is φ = 2466780160.

The previous prime is 2671357771. The next prime is 2671357789. The reversal of 2671357781 is 1877531762.

It can be written as a sum of positive squares in 4 ways, for example, as 749938225 + 1921419556 = 27385^2 + 43834^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2671357781 is a prime.

It is a super-2 number, since 2×2671357781² = 14272304788218487922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2671357789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1481540 + ... + 1483341.

It is an arithmetic number, because the mean of its divisors is an integer number (360233163).

Almost surely, 2^2671357781 is an apocalyptic number.

It is an amenable number.

2671357781 is a deficient number, since it is larger than the sum of its proper divisors (210507523).

2671357781 is a wasteful number, since it uses less digits than its factorization.

2671357781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964951.

The product of its digits is 493920, while the sum is 47.

The square root of 2671357781 is about 51685.1795101845. The cubic root of 2671357781 is about 1387.5352315919.

The spelling of 2671357781 in words is "two billion, six hundred seventy-one million, three hundred fifty-seven thousand, seven hundred eighty-one".