2611391012 has 18 divisors (see below), whose sum is σ = 4839534882. Its totient is φ = 1228691584.

The previous prime is 2611391011. The next prime is 2611391023. The reversal of 2611391012 is 2101931162.

It can be written as a sum of positive squares in 3 ways, for example, as 458987776 + 2152403236 = 21424^2 + 46394^2 .

It is not an unprimeable number, because it can be changed into a prime (2611391011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 418298 + ... + 424494.

It is an arithmetic number, because the mean of its divisors is an integer number (268863049).

Almost surely, 2^2611391012 is an apocalyptic number.

It is an amenable number.

2611391012 is a deficient number, since it is larger than the sum of its proper divisors (2228143870).

2611391012 is an frugal number, since it uses more digits than its factorization.

2611391012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12415 (or 6216 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 2611391012 is about 51101.7711239053. The cubic root of 2611391012 is about 1377.0740730779.

The spelling of 2611391012 in words is "two billion, six hundred eleven million, three hundred ninety-one thousand, twelve".