2646553011261 has 16 divisors (see below), whose sum is σ = 3564664802688. Its totient is φ = 1746414648000.

The previous prime is 2646553011199. The next prime is 2646553011299. The reversal of 2646553011261 is 1621103556462.

It is not a de Polignac number, because 2646553011261 - 2⁶ = 2646553011197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646553011061) by changing a digit.

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, 117850 + ... + 2303691.

It is an arithmetic number, because the mean of its divisors is an integer number (222791550168).

Almost surely, 2^{2646553011261} is an apocalyptic number.

It is an amenable number.

2646553011261 is a deficient number, since it is larger than the sum of its proper divisors (918111791427).

2646553011261 is a wasteful number, since it uses less digits than its factorization.

2646553011261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425252.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 2646553011261 in words is "two trillion, six hundred forty-six billion, five hundred fifty-three million, eleven thousand, two hundred sixty-one".