2691605143 has 2 divisors, whose sum is σ = 2691605144. Its totient is φ = 2691605142.

The previous prime is 2691605131. The next prime is 2691605177. The reversal of 2691605143 is 3415061962.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2691605143 - 2¹³ = 2691596951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2691600143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345802571 + 1345802572.

It is an arithmetic number, because the mean of its divisors is an integer number (1345802572).

Almost surely, 2^2691605143 is an apocalyptic number.

2691605143 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691605143 is an equidigital number, since it uses as much as digits as its factorization.

2691605143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 2691605143 is about 51880.6817900459. The cubic root of 2691605143 is about 1391.0319860723.

The spelling of 2691605143 in words is "two billion, six hundred ninety-one million, six hundred five thousand, one hundred forty-three".