56540266601791 has 16 divisors (see below), whose sum is σ = 66858415395840. Its totient is φ = 46782998771040.

The previous prime is 56540266601761. The next prime is 56540266601857. The reversal of 56540266601791 is 19710666204565.

It is not a de Polignac number, because 56540266601791 - 2⁵ = 56540266601759 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 (56540266601711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25560501 + ... + 27684286.

It is an arithmetic number, because the mean of its divisors is an integer number (4178650962240).

Almost surely, 2^{56540266601791} is an apocalyptic number.

56540266601791 is a deficient number, since it is larger than the sum of its proper divisors (10318148794049).

56540266601791 is a wasteful number, since it uses less digits than its factorization.

56540266601791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53250054.

The product of its (nonzero) digits is 16329600, while the sum is 58.

The spelling of 56540266601791 in words is "fifty-six trillion, five hundred forty billion, two hundred sixty-six million, six hundred one thousand, seven hundred ninety-one".