56611511010001 has 16 divisors (see below), whose sum is σ = 57939968479680. Its totient is φ = 55297312816320.

The previous prime is 56611511009993. The next prime is 56611511010059. The reversal of 56611511010001 is 10001011511665.

It is a cyclic number.

It is not a de Polignac number, because 56611511010001 - 2³ = 56611511009993 is a prime.

It is a super-3 number, since 3×56611511010001³ (a number of 42 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56611511010601) 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, 538111 + ... + 10654228.

It is an arithmetic number, because the mean of its divisors is an integer number (3621248029980).

Almost surely, 2^{56611511010001} is an apocalyptic number.

It is an amenable number.

56611511010001 is a deficient number, since it is larger than the sum of its proper divisors (1328457469679).

56611511010001 is a wasteful number, since it uses less digits than its factorization.

56611511010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11192976.

The product of its (nonzero) digits is 900, while the sum is 28.

Adding to 56611511010001 its reverse (10001011511665), we get a palindrome (66612522521666).

The spelling of 56611511010001 in words is "fifty-six trillion, six hundred eleven billion, five hundred eleven million, ten thousand, one".