2064555661895 has 16 divisors (see below), whose sum is σ = 2480226220800. Its totient is φ = 1649805890304.

The previous prime is 2064555661769. The next prime is 2064555661907. The reversal of 2064555661895 is 5981665554602.

It is a cyclic number.

It is not a de Polignac number, because 2064555661895 - 2¹⁴ = 2064555645511 is a prime.

It is a congruent number.

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, 17369507 + ... + 17487963.

It is an arithmetic number, because the mean of its divisors is an integer number (155014138800).

Almost surely, 2^{2064555661895} is an apocalyptic number.

2064555661895 is a deficient number, since it is larger than the sum of its proper divisors (415670558905).

2064555661895 is a wasteful number, since it uses less digits than its factorization.

2064555661895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122314.

The product of its (nonzero) digits is 77760000, while the sum is 62.

The spelling of 2064555661895 in words is "two trillion, sixty-four billion, five hundred fifty-five million, six hundred sixty-one thousand, eight hundred ninety-five".