2491018015 has 8 divisors (see below), whose sum is σ = 2996678448. Its totient is φ = 1987843200.

The previous prime is 2491018003. The next prime is 2491018043. The reversal of 2491018015 is 5108101942.

It is a happy number.

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

It is not a de Polignac number, because 2491018015 - 2⁵ = 2491017983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619197 + ... + 623206.

It is an arithmetic number, because the mean of its divisors is an integer number (374584806).

Almost surely, 2^2491018015 is an apocalyptic number.

2491018015 is a deficient number, since it is larger than the sum of its proper divisors (505660433).

2491018015 is a wasteful number, since it uses less digits than its factorization.

2491018015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242809.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 2491018015 is about 49910.0993286930. The cubic root of 2491018015 is about 1355.5814672839.

Adding to 2491018015 its reverse (5108101942), we get a palindrome (7599119957).

The spelling of 2491018015 in words is "two billion, four hundred ninety-one million, eighteen thousand, fifteen".