2640215515876 has 27 divisors (see below), whose sum is σ = 4709506156411. Its totient is φ = 1295115570944.

The previous prime is 2640215515789. The next prime is 2640215515891. The reversal of 2640215515876 is 6785155120462.

The square root of 2640215515876 is 1624874.

It is a perfect power (a square), and thus also a powerful number.

2640215515876 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 157775784100 + 2482439731776 = 397210^2 + 1575576^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 172228980 + ... + 172244308.

Almost surely, 2^{2640215515876} is an apocalyptic number.

2640215515876 is the 1624874-th square number.

It is an amenable number.

2640215515876 is a deficient number, since it is larger than the sum of its proper divisors (2069290640535).

2640215515876 is an frugal number, since it uses more digits than its factorization.

2640215515876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30768 (or 15384 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 52.

The spelling of 2640215515876 in words is "two trillion, six hundred forty billion, two hundred fifteen million, five hundred fifteen thousand, eight hundred seventy-six".