4261266621623 has 4 divisors (see below), whose sum is σ = 4648654496328. Its totient is φ = 3873878746920.

The previous prime is 4261266621593. The next prime is 4261266621679. The reversal of 4261266621623 is 3261266621624.

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

It is a cyclic number.

It is not a de Polignac number, because 4261266621623 - 2²² = 4261262427319 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 (4261266621683) 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 3 ways as a sum of consecutive naturals, for example, 193693937336 + ... + 193693937357.

It is an arithmetic number, because the mean of its divisors is an integer number (1162163624082).

Almost surely, 2^{4261266621623} is an apocalyptic number.

4261266621623 is a deficient number, since it is larger than the sum of its proper divisors (387387874705).

4261266621623 is a wasteful number, since it uses less digits than its factorization.

4261266621623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387387874704.

The product of its digits is 1492992, while the sum is 47.

Subtracting from 4261266621623 its reverse (3261266621624), we obtain a palindrome (999999999999).

The spelling of 4261266621623 in words is "four trillion, two hundred sixty-one billion, two hundred sixty-six million, six hundred twenty-one thousand, six hundred twenty-three".