2640545565555 has 16 divisors (see below), whose sum is σ = 4225123288224. Its totient is φ = 1408207507200.

The previous prime is 2640545565517. The next prime is 2640545565571. The reversal of 2640545565555 is 5555655450462.

It is not a de Polignac number, because 2640545565555 - 2³² = 2636250598259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2640545565495 and 2640545565504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4954354 + ... + 5461383.

It is an arithmetic number, because the mean of its divisors is an integer number (264070205514).

Almost surely, 2^{2640545565555} is an apocalyptic number.

2640545565555 is a deficient number, since it is larger than the sum of its proper divisors (1584577722669).

2640545565555 is a wasteful number, since it uses less digits than its factorization.

2640545565555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10432646.

The product of its (nonzero) digits is 90000000, while the sum is 57.

The spelling of 2640545565555 in words is "two trillion, six hundred forty billion, five hundred forty-five million, five hundred sixty-five thousand, five hundred fifty-five".