4126063516581 has 4 divisors (see below), whose sum is σ = 5501418022112. Its totient is φ = 2750709011052.

The previous prime is 4126063516577. The next prime is 4126063516583. The reversal of 4126063516581 is 1856153606214.

4126063516581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4126063516581 - 2² = 4126063516577 is a prime.

It is a super-2 number, since 2×4126063516581² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4126063516581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4126063516583) 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, 687677252761 + ... + 687677252766.

It is an arithmetic number, because the mean of its divisors is an integer number (1375354505528).

Almost surely, 2^{4126063516581} is an apocalyptic number.

It is an amenable number.

4126063516581 is a deficient number, since it is larger than the sum of its proper divisors (1375354505531).

4126063516581 is a wasteful number, since it uses less digits than its factorization.

4126063516581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375354505530.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 4126063516581 in words is "four trillion, one hundred twenty-six billion, sixty-three million, five hundred sixteen thousand, five hundred eighty-one".