2615491864 has 32 divisors (see below), whose sum is σ = 4982169600. Its totient is φ = 1286952480.

The previous prime is 2615491847. The next prime is 2615491867. The reversal of 2615491864 is 4681945162.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2615491867) 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, 769609 + ... + 772999.

It is an arithmetic number, because the mean of its divisors is an integer number (155692800).

Almost surely, 2^2615491864 is an apocalyptic number.

It is an amenable number.

2615491864 is a deficient number, since it is larger than the sum of its proper divisors (2366677736).

2615491864 is a wasteful number, since it uses less digits than its factorization.

2615491864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4903 (or 4899 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 2615491864 is about 51141.8797464466. The cubic root of 2615491864 is about 1377.7945350161.

The spelling of 2615491864 in words is "two billion, six hundred fifteen million, four hundred ninety-one thousand, eight hundred sixty-four".