2661339504855 has 16 divisors (see below), whose sum is σ = 4262363393760. Its totient is φ = 1417974340608.

The previous prime is 2661339504841. The next prime is 2661339504869. The reversal of 2661339504855 is 5584059331662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2661339504841) and next prime (2661339504869).

It is not a de Polignac number, because 2661339504855 - 2⁴ = 2661339504839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2661339504795 and 2661339504804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87904902 + ... + 87935171.

It is an arithmetic number, because the mean of its divisors is an integer number (266397712110).

Almost surely, 2^{2661339504855} is an apocalyptic number.

2661339504855 is a deficient number, since it is larger than the sum of its proper divisors (1601023888905).

2661339504855 is a wasteful number, since it uses less digits than its factorization.

2661339504855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175841090.

The product of its (nonzero) digits is 23328000, while the sum is 57.

The spelling of 2661339504855 in words is "two trillion, six hundred sixty-one billion, three hundred thirty-nine million, five hundred four thousand, eight hundred fifty-five".