2661474264263 has 4 divisors (see below), whose sum is σ = 2663128382880. Its totient is φ = 2659820145648.

The previous prime is 2661474264217. The next prime is 2661474264331. The reversal of 2661474264263 is 3624624741662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2661474264263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661474264563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827056895 + ... + 827060112.

It is an arithmetic number, because the mean of its divisors is an integer number (665782095720).

Almost surely, 2^{2661474264263} is an apocalyptic number.

2661474264263 is a deficient number, since it is larger than the sum of its proper divisors (1654118617).

2661474264263 is a wasteful number, since it uses less digits than its factorization.

2661474264263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654118616.

The product of its digits is 13934592, while the sum is 53.

The spelling of 2661474264263 in words is "two trillion, six hundred sixty-one billion, four hundred seventy-four million, two hundred sixty-four thousand, two hundred sixty-three".