2720681491 has 12 divisors (see below), whose sum is σ = 3013346952. Its totient is φ = 2454452000.

The previous prime is 2720681471. The next prime is 2720681507. The reversal of 2720681491 is 1941860272.

It is not a de Polignac number, because 2720681491 - 2¹³ = 2720673299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2720681461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69970 + ... + 101671.

It is an arithmetic number, because the mean of its divisors is an integer number (251112246).

Almost surely, 2^2720681491 is an apocalyptic number.

2720681491 is a deficient number, since it is larger than the sum of its proper divisors (292665461).

2720681491 is a wasteful number, since it uses less digits than its factorization.

2720681491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171794 (or 171783 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 2720681491 is about 52160.1523291487. The cubic root of 2720681491 is about 1396.0229802417.

The spelling of 2720681491 in words is "two billion, seven hundred twenty million, six hundred eighty-one thousand, four hundred ninety-one".