2506991011 has 8 divisors (see below), whose sum is σ = 2877645920. Its totient is φ = 2139464448.

The previous prime is 2506991009. The next prime is 2506991017. The reversal of 2506991011 is 1101996052.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2506991011 - 2¹ = 2506991009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2506991017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780366 + ... + 783571.

It is an arithmetic number, because the mean of its divisors is an integer number (359705740).

Almost surely, 2^2506991011 is an apocalyptic number.

2506991011 is a deficient number, since it is larger than the sum of its proper divisors (370654909).

2506991011 is a wasteful number, since it uses less digits than its factorization.

2506991011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564173.

The product of its (nonzero) digits is 4860, while the sum is 34.

The square root of 2506991011 is about 50069.8613039821. The cubic root of 2506991011 is about 1358.4727324420.

The spelling of 2506991011 in words is "two billion, five hundred six million, nine hundred ninety-one thousand, eleven".