2640503518 has 4 divisors (see below), whose sum is σ = 3960755280. Its totient is φ = 1320251758.

The previous prime is 2640503491. The next prime is 2640503519. The reversal of 2640503518 is 8153050462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8153050462 = 2 ⋅4076525231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640503519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660125878 + ... + 660125881.

It is an arithmetic number, because the mean of its divisors is an integer number (990188820).

Almost surely, 2^2640503518 is an apocalyptic number.

2640503518 is a deficient number, since it is larger than the sum of its proper divisors (1320251762).

2640503518 is a wasteful number, since it uses less digits than its factorization.

2640503518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320251761.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 2640503518 is about 51385.8299339419. The cubic root of 2640503518 is about 1382.1725071460.

The spelling of 2640503518 in words is "two billion, six hundred forty million, five hundred three thousand, five hundred eighteen".